JEE Main & Advanced Physics Motion in a Straight Line / सरल रेखा में गति Question Bank

done Motion Under Gravity Total Questions - 81

• question_answer1)
  A stone falls from a balloon that is descending at a uniform rate of \[12\,\,m/s\]. The displacement of the stone from the point of release after 10 sec is
  A)
  490 \[m\]          done clear
  B)
              510 \[m\] done clear
  C)
              610 \[m\] done clear
  D)
                       725 \[m\] done clear
  View Solution play_arrow

• question_answer2)
  A ball is dropped on the floor from a height of 10 m. It rebounds to a height of 2.5 m. If the ball is in contact with the floor for 0.01 sec, the average acceleration during contact is                     [BHU 1997; CPMT 1997]
  A)
              2100\[m/{{\sec }^{2}}\]downwards done clear
  B)
              2100\[m/{{\sec }^{2}}\]upwards done clear
  C)
              1400\[m/{{\sec }^{2}}\]       done clear
  D)
              700\[m/{{\sec }^{2}}\] done clear
  View Solution play_arrow

• question_answer3)
  A body A is projected upwards with a velocity of \[98\,m/s\]. The second body B is projected upwards with the same initial velocity but after 4 sec. Both the bodies will meet after
  A)
              6 sec    done clear
  B)
              8 sec done clear
  C)
              10 sec  done clear
  D)
              12 sec done clear
  View Solution play_arrow

• question_answer4)
  Two bodies of different masses \[{{m}_{a}}\] and \[{{m}_{b}}\] are dropped from two different heights \[a\] and \[b\]. The ratio of the time taken by the two to cover these distances are  [NCERT 1972; MP PMT 1993]
  A)
              \[a:b\]   done clear
  B)
              \[b:a\] done clear
  C)
              \[\sqrt{a}:\sqrt{b}\]     done clear
  D)
              \[{{a}^{2}}:{{b}^{2}}\] done clear
  View Solution play_arrow

• question_answer5)
  A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of       [MNR 1998]
  A)
              \[3\,\,s\]            done clear
  B)
              \[5\,s\] done clear
  C)
              \[7\,s\]  done clear
  D)
              \[9\,s\] done clear
  View Solution play_arrow

• question_answer6)
  A stone is dropped into water from a bridge \[44.1\]\[m\] above the water. Another stone is thrown vertically downward 1 sec later. Both strike the water simultaneously. What was the initial speed of the second stone
  A)
              \[12.25\,\,m/s\] done clear
  B)
              \[14.75\,\,m/s\] done clear
  C)
              \[16.23\,\,m/s\] done clear
  D)
              \[17.15\,\,m/s\] done clear
  View Solution play_arrow

• question_answer7)
  An iron ball and a wooden ball of the same radius are released from the same height in vacuum. They take the same time to reach the ground. The reason for this is
  A)
                  Acceleration due to gravity in vacuum is same  irrespective of the size and mass of the body done clear
  B)
              Acceleration due to gravity in vacuum depends upon the mass of the body done clear
  C)
              There is no acceleration due to gravity in vacuum done clear
  D)
              In vacuum there is a resistance offered to the motion of the body and this resistance depends upon the mass of the body done clear
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• question_answer8)
  A body is thrown vertically upwards. If air resistance is to be taken into account, then the time during which the body rises is                                          [RPET 2000; KCET 2001; DPMT 2001]
  A)
              Equal to the time of fall            done clear
  B)
              Less than the time of fall done clear
  C)
              Greater than the time of fall done clear
  D)
              Twice the time of fall done clear
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• question_answer9)
  A ball P is dropped vertically and another ball Q is thrown horizontally with the same velocities from the same height and at the same time. If air resistance is neglected, then                         [MNR 1986; BHU 1994]
  A)
              Ball P reaches the ground first done clear
  B)
              Ball Q reaches the ground first done clear
  C)
              Both reach the ground at the same time done clear
  D)
              The respective masses of the two balls will decide the time done clear
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• question_answer10)
  A body is released from a great height and falls freely towards the earth. Another body is released from the same height exactly one second later. The separation between the two bodies, two seconds after the release of the second body is                          [CPMT 1983; Kerala PMT 2002]
  A)
              \[4.9\,m\]          done clear
  B)
              \[9.8\,m\] done clear
  C)
              \[19.6\,m\]        done clear
  D)
              \[24.5\,m\] done clear
  View Solution play_arrow

• question_answer11)
  An object is projected upwards with a velocity of 100 \[m/s\]. It will strike the ground after (approximately) [NCERT 1981; AFMC 1995]
  A)
              10 sec  done clear
  B)
              20 sec done clear
  C)
              15 sec  done clear
  D)
              5 sec done clear
  View Solution play_arrow

• question_answer12)
  A stone dropped from the top of the tower touches the ground in 4 sec. The height of the tower is about                [MP PET 1986; AFMC 1994; CPMT 1997; BHU 1998;  DPMT 1999; RPET 1999; MH CET 2003]
  A)
              \[=\left[ 7\times 5+\frac{1}{2}4\times {{(5)}^{2}} \right]-\left[ 7\times 4+\frac{1}{2}4\times {{(4)}^{2}} \right]=25\ m\] done clear
  B)
              \[40\,m\] done clear
  C)
              \[20\,\,m\]         done clear
  D)
              \[160\,\,m\] done clear
  View Solution play_arrow

• question_answer13)
  A body is released from the top of a tower of height \[h\]. It takes \[v=\frac{1}{2}b{{t}^{2}}+{{v}_{0}}\] sec to reach the ground. Where will be the ball after time \[t/2\] sec           [NCERT 1981; MP PMT 2004]
  A)
              At \[h/2\]from the ground done clear
  B)
              At \[h/4\] from the ground done clear
  C)
              Depends upon mass and volume of the body done clear
  D)
              At \[3h/4\]  from the ground done clear
  View Solution play_arrow

• question_answer14)
  A mass m slips along the wall of a semispherical surface of radius R. The velocity at the bottom of the surface is              [MP PMT 1993]                    
  A)
              \[\sqrt{Rg}\] done clear
  B)
              \[\sqrt{2Rg}\] done clear
  C)
              \[2\sqrt{\pi Rg}\] done clear
  D)
              \[\sqrt{\pi Rg}\] done clear
  View Solution play_arrow

• question_answer15)
  A frictionless wire AB is fixed on a sphere of radius R. A very small spherical ball slips on this wire. The time taken by this ball to slip from A to B is
  A)
              \[\frac{2\sqrt{gR}}{g\cos \theta }\] done clear
  B)
              \[2\sqrt{gR}.\frac{\cos \theta }{g}\] done clear
  C)
                                                  \[2\sqrt{\frac{R}{g}}\] done clear
  D)
              \[\frac{gR}{\sqrt{g\cos \theta }}\] done clear
  View Solution play_arrow

• question_answer16)
  A body is slipping from an inclined plane of height \[h\] and length \[l\]. If the angle of inclination is \[\theta \], the time taken by the body to come from the top to the bottom of this inclined plane is 
  A)
              \[\sqrt{\frac{2h}{g}}\]            done clear
  B)
              \[\sqrt{\frac{2l}{g}}\] done clear
  C)
              \[\frac{1}{\sin \theta }\sqrt{\frac{2h}{g}}\]   done clear
  D)
              \[\sin \theta \sqrt{\frac{2h}{g}}\] done clear
  View Solution play_arrow

• question_answer17)
  A particle is projected up with an initial velocity of \[80ft/\sec \]. The ball will be at a height of \[96ft\] from the ground after                             [MP PMT 1985]
  A)
              2.0 and 3.0 sec            done clear
  B)
              Only at 3.0 sec done clear
  C)
              Only at 2.0 sec done clear
  D)
                       After 1 and 2 sec done clear
  View Solution play_arrow

• question_answer18)
  A body falls from rest, its velocity at the end of first second is \[(g=32ft/\sec )\]                                   [AFMC 1980]
  A)
              \[16\,\,ft/\sec \]  done clear
  B)
              \[32\,\,ft/\sec \] done clear
  C)
              \[64\,\,ft/\sec \] done clear
  D)
                       \[24\,\,ft/\sec \] done clear
  View Solution play_arrow

• question_answer19)
  A stone thrown upward with a speed \[u\]  from the top of the tower reaches the ground with a velocity \[3u\]. The height of the tower is                    [EAMCET 1983; RPET 2003]
  A)
              \[3{{u}^{2}}/g\]       done clear
  B)
              \[4{{u}^{2}}/g\] done clear
  C)
              \[6{{u}^{2}}/g\] done clear
  D)
                       \[9{{u}^{2}}/g\] done clear
  View Solution play_arrow

• question_answer20)
  Two stones of different masses are dropped simultaneously from the top of a building                                    [EAMCET 1978]
  A)
              Smaller stone hit the ground earlier done clear
  B)
              Larger stone hit the ground earlier done clear
  C)
              Both stones reach the ground simultaneously done clear
  D)
               Which of the stones reach the ground earlier depends on the composition of the stone done clear
  View Solution play_arrow

• question_answer21)
  A body thrown with an initial speed of \[96\,ft/\sec \] reaches the ground after \[(g=32ft/{{\sec }^{2}})\]               [EAMCET 1980]
  A)
              3 sec    done clear
  B)
              6 sec done clear
  C)
              12 sec done clear
  D)
              8  sec done clear
  View Solution play_arrow

• question_answer22)
  A stone is dropped from a certain height which can reach the ground in 5 second. If the stone is stopped after 3 second of its fall and then allowed to fall again, then the time taken by the stone to reach the ground for the remaining distance is                                [MNR 1985]
  A)
              2 sec    done clear
  B)
              3 sec done clear
  C)
              4 sec    done clear
  D)
              None of these done clear
  View Solution play_arrow

• question_answer23)
  A man in a balloon rising vertically with an acceleration of \[4.9\,m/{{\sec }^{2}}\] releases a ball 2 sec after the balloon is let go from the ground. The greatest height above the ground reached by the ball is \[(g=9.8\,m/{{\sec }^{2}})\]       [MNR 1986]
  A)
              14.7 m done clear
  B)
              19.6 m done clear
  C)
              9.8 m   done clear
  D)
              24.5 m done clear
  View Solution play_arrow

• question_answer24)
  A particle is dropped under gravity from rest from a height \[h(g=9.8\,m/{{\sec }^{2}})\] and it travels a distance \[9h/25\] in the last second, the height \[h\] is                         [MNR 1987]
  A)
              100 m  done clear
  B)
              122.5 m done clear
  C)
              145 m done clear
  D)
              167.5 m done clear
  View Solution play_arrow

• question_answer25)
  A balloon is at a height of 81 m and is ascending upwards with a velocity of 12 m/s. A body of \[2kg\] weight is dropped from it. If \[g=10\,m/{{s}^{2}}\], the body will reach the surface of the earth in                            [MP PMT 1994]
  A)
              1.5 s     done clear
  B)
              4.025 s done clear
  C)
              5.4 s     done clear
  D)
              6.75 s done clear
  View Solution play_arrow

• question_answer26)
  An aeroplane is moving with a velocity \[u\]. It drops a packet from a height \[h\]. The time \[t\] taken by the packet in reaching the ground will be
  A)
              \[\sqrt{\left( \frac{2g}{h} \right)}\]      done clear
  B)
              \[\sqrt{\left( \frac{2u}{g} \right)}\] done clear
  C)
              \[\sqrt{\left( \frac{h}{2g} \right)}\] done clear
  D)
              \[\sqrt{\left( \frac{2h}{g} \right)}\] done clear
  View Solution play_arrow

• question_answer27)
  Water drops fall at regular intervals from a tap which is \[5\,\,m\] above the ground. The third drop is leaving the tap at the instant the first drop touches the ground. How far above the ground is the second drop at that instant             [CBSE PMT 1995]
  A)
              2.50 m done clear
  B)
              3.75 m done clear
  C)
              4.00 m done clear
  D)
              1.25 m done clear
  View Solution play_arrow

• question_answer28)
  A ball is thrown vertically upwards from the top of a tower at \[4.9\,\,m{{s}^{-1}}\]. It strikes the pond near the base of the tower after 3 seconds. The height of the tower is [Manipal MEE 1995]
  A)
              73.5 m done clear
  B)
              44.1 m done clear
  C)
              29.4 m done clear
  D)
                       None of these done clear
  View Solution play_arrow

• question_answer29)
  An aeroplane is moving with horizontal velocity \[u\] at height \[h\].  The velocity of a packet dropped from it on the earth's surface will be (\[g\] is acceleration due to gravity) [MP PET 1995]
  A)
              \[\sqrt{{{u}^{2}}+2gh}\]    done clear
  B)
              \[\sqrt{2gh}\] done clear
  C)
              \[2gh\]  done clear
  D)
              \[\sqrt{{{u}^{2}}-2gh}\] done clear
  View Solution play_arrow

• question_answer30)
  A rocket is fired upward from the earth's surface such that it creates an acceleration of 19.6 m/sec2. If after 5 sec its engine is switched off, the maximum height of the rocket from earth's surface would be                            [MP PET 1995]
  A)
              245 m  done clear
  B)
              490 m done clear
  C)
              980 m  done clear
  D)
              735 m done clear
  View Solution play_arrow

• question_answer31)
  A bullet is fired with a speed of \[1000\,\,m/\sec \] in order to hit a target 100 m away. If \[g=10\,\,m/{{s}^{2}}\], the gun should be aimed                                  [MP PET 1996]
  A)
              Directly towards the target done clear
  B)
              5 cm above the target done clear
  C)
              10 cm above the target done clear
  D)
              15 cm above the target done clear
  View Solution play_arrow

• question_answer32)
  A body starts to fall freely under gravity. The distances covered by it in first, second and third second are in ratio                             [MP PET 1997; RPET 2001]
  A)
              \[1:3:5\]            done clear
  B)
              \[1:2:3\] done clear
  C)
              \[1:4:9\] done clear
  D)
                       \[1:5:6\] done clear
  View Solution play_arrow

• question_answer33)
  \[P,\,Q\] and \[R\] are three balloons ascending with velocities \[U,\,4U\] and \[8U\] respectively. If stones of the same mass be dropped from each, when they are at the same height, then                             [ISM Dhanbad 1994]
  A)
              They reach the ground at the same time done clear
  B)
              Stone from \[P\] reaches the ground first done clear
  C)
              Stone from \[R\] reaches the ground first done clear
  D)
              Stone from \[Q\] reaches the ground first done clear
  View Solution play_arrow

• question_answer34)
  A body is projected up with a speed \['u'\] and the time taken by it is \[T\] to reach the maximum height \[H\]. Pick out the correct statement                                  [EAMCET (Engg.) 1995]
  A)
              It reaches \[H/2\] in \[T/2\] sec done clear
  B)
              It acquires velocity \[u/2\] in \[T/2\sec \] done clear
  C)
              Its velocity is \[u/2\] at \[H/2\] done clear
  D)
              Same velocity at \[2T\] done clear
  View Solution play_arrow

• question_answer35)
  A body falling for 2 seconds covers a distance \[S\] equal to that covered in next second. Taking \[g=10\,m/{{s}^{2}},\,S=\]              [EAMCET (Engg.) 1995]
  A)
              30 m done clear
  B)
              10 m done clear
  C)
              60 m    done clear
  D)
              20 m done clear
  View Solution play_arrow

• question_answer36)
  A body dropped from a height \[h\] with an initial speed zero, strikes the ground with a velocity\[3\,km/h\]. Another body of same mass is dropped from the same height \[h\] with an initial speed \[-{u}'=4km/h\] . Find the final velocity of second body with which it strikes the ground          [CBSE PMT 1996]
  A)
              3 km/h done clear
  B)
              4 km/h done clear
  C)
              5 km/h done clear
  D)
                       12 km/h done clear
  View Solution play_arrow

• question_answer37)
  A ball of mass \[{{m}_{1}}\] and another ball of mass \[{{m}_{2}}\] are dropped from equal height. If time taken by the balls are \[{{t}_{1}}\] and \[{{t}_{2}}\] respectively, then                             [BHU 1997]
  A)
               \[{{t}_{1}}=\frac{{{t}_{2}}}{2}\] done clear
  B)
              \[{{t}_{1}}={{t}_{2}}\] done clear
  C)
              \[{{t}_{1}}=4{{t}_{2}}\]    done clear
  D)
              \[{{t}_{1}}=\frac{{{t}_{2}}}{4}\] done clear
  View Solution play_arrow

• question_answer38)
  With what velocity a ball be projected vertically so that the distance covered by it in 5th second is twice the distance it covers in its 6th second \[(g=10\,m/{{s}^{2}})\] [CPMT 1997; MH CET 2000]
  A)
              58.8 m/s          done clear
  B)
              49 m/s done clear
  C)
              65 m/s done clear
  D)
                       19.6 m/s done clear
  View Solution play_arrow

• question_answer39)
  A body sliding on a smooth inclined plane requires 4 seconds to reach the bottom starting from rest at the top. How much time does it take to cover one-fourth distance starting from rest at the top                                 [BHU 1998]
  A)
              1 s        done clear
  B)
              2 s done clear
  C)
              4 s        done clear
  D)
              16 s done clear
  View Solution play_arrow

• question_answer40)
  A ball is dropped downwards. After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds            [BHU 1998]
  A)
              25 m    done clear
  B)
              20 m done clear
  C)
              50 m    done clear
  D)
              9.8 m done clear
  View Solution play_arrow

• question_answer41)
  A stone is thrown with an initial speed of 4.9 m/s from a bridge in vertically upward direction. It falls down in water after 2 sec. The height of the bridge is                         [AFMC 1999; Pb. PMT 2003]
  A)
              4.9 m   done clear
  B)
              9.8 m done clear
  C)
              19.8 m done clear
  D)
              24.7 m done clear
  View Solution play_arrow

• question_answer42)
  A stone is shot straight upward with a speed of 20 m/sec from a tower 200 m high. The speed with which it strikes the ground is approximately                             [AMU (Engg.) 1999]
  A)
              60 m/sec          done clear
  B)
              65 m/sec done clear
  C)
              70 m/sec done clear
  D)
                       75 m/sec done clear
  View Solution play_arrow

• question_answer43)
  A body freely falling from the rest has a velocity ?v? after it falls through a height ?h?. The distance it has to fall down for its velocity to become double, is                 [BHU 1999]
  A)
              \[2h\]    done clear
  B)
              \[4h\] done clear
  C)
              \[6h\]    done clear
  D)
              \[8h\] done clear
  View Solution play_arrow

• question_answer44)
  The time taken by a block of wood (initially at rest) to slide down a smooth inclined plane 9.8 m long (angle of inclination is \[{{30}^{o}}\]) is             [JIPMER 1999]
  A)
              \[\frac{1}{2}\sec \] done clear
  B)
              2 sec done clear
  C)
              4 sec done clear
  D)
              1 sec done clear
  View Solution play_arrow

• question_answer45)
  Velocity of a body on reaching the point from which it was projected upwards, is      [AIIMS 1999; Pb. PMT 1999]
  A)
              \[v=0\] done clear
  B)
              \[v=2u\] done clear
  C)
              \[v=0.5u\] done clear
  D)
                       \[v=u\] done clear
  View Solution play_arrow

• question_answer46)
  A body projected vertically upwards with a velocity \[u\] returns to the starting point in 4 seconds. If \[g=10\]m/sec2, the value of \[u\] is       [KCET 1999]
  A)
              5 m/sec            done clear
  B)
              10 m/sec done clear
  C)
              15 m/sec done clear
  D)
                       20 m/sec done clear
  View Solution play_arrow

• question_answer47)
  Time taken by an object falling from rest to cover the height of \[{{h}_{1}}\] and \[{{h}_{2}}\] is respectively \[{{t}_{1}}\] and \[{{t}_{2}}\] then the ratio of \[{{t}_{1}}\] to \[{{t}_{2}}\] is   [RPMT 1999; RPET 2002]
  A)
              \[{{h}_{1}}\ :\ {{h}_{2}}\]   done clear
  B)
              \[\sqrt{{{h}_{1}}}\ :\ \sqrt{{{h}_{2}}}\] done clear
  C)
              \[{{h}_{1}}\ :\ 2{{h}_{2}}\] done clear
  D)
                       2h1 : h2 done clear
  View Solution play_arrow

• question_answer48)
  A body is thrown vertically up from the ground. It reaches a maximum height of 100m in 5sec. After what time it will reach the ground from the maximum height position  [Pb. PMT 2000]
  A)
              1.2 sec done clear
  B)
              5 sec done clear
  C)
              10 sec  done clear
  D)
              25 sec done clear
  View Solution play_arrow

• question_answer49)
  A body thrown vertically upwards with an initial velocity \[u\] reaches maximum height in 6 seconds. The ratio of the distances travelled by the body in the first second and the seventh second is         [EAMCET (Engg.) 2000]
  A)
              1 : 1     done clear
  B)
              11 : 1 done clear
  C)
              1 : 2     done clear
  D)
              1 : 11 done clear
  View Solution play_arrow

• question_answer50)
  A particle is thrown vertically upwards. If its velocity at half of the maximum height is 10 m/s, then maximum height attained by it is (Take \[g=10\] m/s2)  [CBSE PMT 2001, 2004]
  A)
              8 m      done clear
  B)
              10 m done clear
  C)
              12 m    done clear
  D)
              16 m done clear
  View Solution play_arrow

• question_answer51)
  A body, thrown upwards with some velocity, reaches the maximum height of 20m. Another body with double the mass thrown up, with double initial velocity will reach a maximum height of              [KCET 2001]
  A)
              200 m  done clear
  B)
              16 m done clear
  C)
              80 m    done clear
  D)
              40 m done clear
  View Solution play_arrow

• question_answer52)
  A balloon starts rising from the ground with an acceleration of 1.25 m/s2 after 8s, a stone is released from the balloon. The stone will (\[g=10\] m/s2)            [KCET 2001]
  A)
              Reach the ground in 4 second done clear
  B)
              Begin to move down after being released done clear
  C)
              Have a displacement of 50 m done clear
  D)
              Cover a distance of 40 m in reaching the ground done clear
  View Solution play_arrow

• question_answer53)
  A body is thrown vertically upwards with a velocity \[u\]. Find the true statement from the following              [Kerala 2001]
  A)
              Both velocity and acceleration are zero at its highest point      done clear
  B)
              Velocity is maximum and acceleration is zero at the highest point done clear
  C)
              Velocity is maximum and acceleration is \[g\] downwards at its highest point done clear
  D)
              Velocity is zero at the highest point and maximum height reached is \[{{u}^{2}}/2g\] done clear
  View Solution play_arrow

• question_answer54)
  A man throws a ball vertically upward and it rises through 20 m and returns to his hands. What was the initial velocity \[(u)\] of the ball and for how much time \[(T)\] it remained in the air \[[g=10m/{{s}^{2}}]\]                                 [MP PET 2001]
  A)
              u = 10 m/s, T = 2s     done clear
  B)
              u = 10 m/s, T = 4s done clear
  C)
              u = 20 m/s, T = 2s done clear
  D)
                       u = 20 m/s, T = 4s done clear
  View Solution play_arrow

• question_answer55)
  A particle when thrown, moves such that it passes from same height at 2 and 10s, the height is         [UPSEAT 2001]
  A)
              \[g\]      done clear
  B)
              \[2g\] done clear
  C)
              \[5g\]    done clear
  D)
              \[10g\] done clear
  View Solution play_arrow

• question_answer56)
  Three different objects of masses \[{{m}_{1}},{{m}_{2}}\] and \[{{m}_{3}}\] are allowed to fall from rest and from the same point ?O? along three different frictionless paths. The speeds of the three objects, on reaching the ground, will be in the ratio of [AIIMS 2002]
  A)
              \[{{m}_{1}}:{{m}_{2}}:{{m}_{3}}\]         done clear
  B)
              \[{{m}_{1}}:2{{m}_{2}}:3{{m}_{3}}\] done clear
  C)
              1 : 1 : 1 done clear
  D)
              \[\frac{1}{{{m}_{1}}}:\frac{1}{{{m}_{2}}}:\frac{1}{{{m}_{3}}}\] done clear
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• question_answer57)
  From the top of a tower, a particle is thrown vertically downwards with a velocity of 10 m/s. The ratio of the distances, covered by it in the 3rd and 2nd seconds of the motion is (Take \[g=10m/{{s}^{2}}\])                             [AIIMS 2000; CBSE PMT 2002]
  A)
              5 : 7     done clear
  B)
              7 : 5 done clear
  C)
              3 : 6     done clear
  D)
              6 : 3 done clear
  View Solution play_arrow

• question_answer58)
  Two balls A and B of same masses are thrown from the top of the building. A, thrown upward with velocity V and B, thrown downward with velocity V, then      [AIEEE 2002]
  A)
              Velocity of A is more than B at the ground done clear
  B)
              Velocity of B is more than A at the ground done clear
  C)
              Both A & B strike the ground with same velocity done clear
  D)
              None of these done clear
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• question_answer59)
  A ball is dropped from top of a tower of 100m height. Simultaneously another ball was thrown upward from bottom of the tower with a speed of 50 m/s (\[g=10m/{{s}^{2}})\]. They will cross each other after          [Orissa JEE 2002]
  A)
              \[1s\]    done clear
  B)
              \[2s\] done clear
  C)
              \[3s\]    done clear
  D)
              \[4s\] done clear
  View Solution play_arrow

• question_answer60)
  A cricket ball is thrown up with a speed of 19.6 ms?1. The maximum height it can reach is                [Kerala PMT 2002]
  A)
              9.8 m   done clear
  B)
              19.6 m done clear
  C)
              29.4 m done clear
  D)
                       39.2 m done clear
  View Solution play_arrow

• question_answer61)
  A very large number of balls are thrown vertically upwards in quick succession in such a way that the next ball is thrown when the previous one is at the maximum height. If the maximum height is 5m, the number of ball thrown per minute is (take \[g=10\,m{{s}^{-2}}\])  [KCET 2002]
  A)
              120      done clear
  B)
              80 done clear
  C)
              60        done clear
  D)
              40 done clear
  View Solution play_arrow

• question_answer62)
  A body falling from a high Minaret travels 40 meters in the last 2 seconds of its fall to ground. Height of Minaret in meters is (take \[g=10m/{{s}^{2}}\])                                   [MP PMT 2002]
  A)
              60        done clear
  B)
              45 done clear
  C)
              80        done clear
  D)
              50 done clear
  View Solution play_arrow

• question_answer63)
  A body falls from a height \[h=200m\] (at New Delhi). The ratio of distance travelled in each 2 sec during t = 0 to \[t=6\] second of the journey is                                   [BHU 2003; CPMT 2004]
  A)
              1 : 4 : 9            done clear
  B)
              1 : 2 : 4 done clear
  C)
              1 : 3 : 5 done clear
  D)
                       1 : 2 : 3 done clear
  View Solution play_arrow

• question_answer64)
  A man drops a ball downside from the roof of a tower of height 400 meters. At the same time another ball is thrown upside with a velocity 50 meter/sec. from the surface of the tower, then they will meet at which height from the surface of the tower                             [CPMT 2003]
  A)
              100 meters       done clear
  B)
              320 meters done clear
  C)
              80 meters done clear
  D)
                       240 meters done clear
  View Solution play_arrow

• question_answer65)
  Two balls are dropped from heights \[h\] and \[2h\] respectively from the earth surface. The ratio of time of these balls to reach the earth is                                 [CPMT 2003]
  A)
              \[1:\sqrt{2}\]    done clear
  B)
              \[\sqrt{2}\] : 1 done clear
  C)
              2 : 1     done clear
  D)
              1 : 4 done clear
  View Solution play_arrow

• question_answer66)
  The acceleration due to gravity on the planet A is 9 times the acceleration due to gravity on planet B. A man jumps to a height of \[2m\] on the surface of A. What is the height of jump by the same person on the planet B       [CBSE PMT 2003]
  A)
              18m     done clear
  B)
              6m done clear
  C)
              \[\frac{2}{3}m\]          done clear
  D)
              \[\frac{2}{9}m\] done clear
  View Solution play_arrow

• question_answer67)
  A body falls from rest in the gravitational field of the earth. The distance travelled in the fifth second of its motion is \[(g=10m/{{s}^{2}})\]                             [MP PET 2003]
  A)
              25m     done clear
  B)
              45m     done clear
  C)
              90m     done clear
  D)
              125m done clear
  View Solution play_arrow

• question_answer68)
  If a body is thrown up with the velocity of 15 m/s then maximum height attained by the body is (g = 10 m/s2) [MP PMT 2003]            
  A)
                          11.25 m                       done clear
  B)
                          16.2 m             done clear
  C)
                          24.5 m             done clear
  D)
                                   7.62 m done clear
  View Solution play_arrow

• question_answer69)
  A balloon is rising vertically up with a velocity of 29 ms?1. A stone is dropped from it and it reaches the ground in 10 seconds. The height of the balloon when the stone was dropped from it is (g = 9.8 ms?2)              [KCET 2004]
  A)
                          100 m             done clear
  B)
                          200 m             done clear
  C)
                          400 m              done clear
  D)
                                   150 m done clear
  View Solution play_arrow

• question_answer70)
  A ball is released from the top of a tower of height h meters. It takes T seconds to reach the ground. What is the position of the ball in T/3 seconds                                [AIEEE 2004]
  A)
                          h/9 meters from the ground                  done clear
  B)
                          7h/9 meters from the ground             done clear
  C)
                          8h/9 meters from the ground    done clear
  D)
                          17h/18 meters from the ground done clear
  View Solution play_arrow

• question_answer71)
  Two balls of same size but the density of one is greater than that of the other are dropped from the same height, then which ball will reach the earth first (air resistance is negligible)                            [J & K CET 2004]           
  A)
                          Heavy ball                   done clear
  B)
                          Light ball             done clear
  C)
                          Both simultaneously                 done clear
  D)
                          Will depend upon the density of the balls done clear
  View Solution play_arrow

• question_answer72)
  A packet is dropped from a balloon which is going upwards with the velocity 12 m/s, the velocity of the packet after 2 seconds will be                                  [Pb PMT 2004]
  A)
                          ?12 m/s                       done clear
  B)
                                   12 m/s             done clear
  C)
                          ?7.6 m/s             done clear
  D)
                          7.6 m/s done clear
  View Solution play_arrow

• question_answer73)
  If a freely falling body travels in the last second a distance equal to the distance travelled by it in the first three second, the time of the travel is            [Pb. PMT 2004; MH CET 2003]
  A)
                          6 sec                done clear
  B)
                          5 sec             done clear
  C)
                          4 sec                done clear
  D)
                          3 sec done clear
  View Solution play_arrow

• question_answer74)
  The effective acceleration of a body, when thrown upwards with acceleration a will be :        [Pb. PMT 2004]
  A)
                          \[\sqrt{a-{{g}^{2}}}\]                      done clear
  B)
                                   \[\sqrt{{{a}^{2}}+{{g}^{2}}}\]             done clear
  C)
                                   \[(a-g)\]                        done clear
  D)
                          \[(a+g)\] done clear
  View Solution play_arrow

• question_answer75)
  A body is thrown vertically upwards with velocity u. The distance travelled by it in the fifth and the sixth seconds are equal. The velocity u is given by (g = 9.8 m/s2)                                                 [UPSEAT 2004]              
  A)
                          24.5 m/s                      done clear
  B)
                          49.0 m/s             done clear
  C)
                          73.5 m/s                      done clear
  D)
                                   98.0 m/s done clear
  View Solution play_arrow

• question_answer76)
  A body, thrown upwards with some velocity reaches the maximum height of 50 m. Another body with double the mass thrown up with double the initial velocity will reach a maximum height of                                 [BHU 2004]
  A)
                          100 m              done clear
  B)
                          200 m             done clear
  C)
                          300 m              done clear
  D)
                          400 m done clear
  View Solution play_arrow

• question_answer77)
  A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at 2 m/s2. He reaches the ground with a speed of 3 m/s. At what height, did he bail out?                                    [AIEEE 2005]           
  A)
  293 m  done clear
  B)
                          111 m             done clear
  C)
                        91 m                done clear
  D)
                          182 m done clear
  View Solution play_arrow

• question_answer78)
  Three particles A, B and C are thrown from the top of a tower with the same speed. A is thrown up, B is thrown down and C is horizontally. They hit the ground with speeds \[{{V}_{A}},\,\,{{V}_{B}}\] and \[{{V}_{C}}\] respectively.                 [Orissa JEE 2005]
  A)
                          \[{{V}_{A}}={{V}_{B}}={{V}_{C}}\]                done clear
  B)
                          \[{{V}_{A}}={{V}_{B}}>{{V}_{C}}\]             done clear
  C)
                        \[{{V}_{B}}>{{V}_{C}}>{{V}_{A}}\]                done clear
  D)
                          \[{{V}_{A}}>{{V}_{B}}={{V}_{C}}\] done clear
  View Solution play_arrow

• question_answer79)
  From the top of a tower two stones, whose masses are in the ratio 1 : 2 are thrown one straight up with an initial speed u and the second straight down with the same speed u. Then, neglecting air resistance                                    [KCET 2005]
  A)
                          The heavier stone hits the ground with a higher speed             done clear
  B)
                          The lighter stone hits the ground with a higher speed                         done clear
  C)
                          Both the stones will have the same speed when they hit the ground.                done clear
  D)
                          The speed can't be determined with the given data. done clear
  View Solution play_arrow

• question_answer80)
  When a ball is thrown up vertically with velocity \[{{V}_{o}}\], it reaches a maximum height of 'h'. If one wishes to triple the maximum height then the ball should be thrown with velocity                               [AIIMS 2005]            
  A)
                          \[\sqrt{3}{{V}_{o}}\]             done clear
  B)
                          \[3{{V}_{o}}\]             done clear
  C)
                        \[9{{V}_{o}}\]                       done clear
  D)
                          \[3/2{{V}_{o}}\] done clear
  View Solution play_arrow

• question_answer81)
  An object start sliding on a frictionless inclined plane and from same height another object start falling freely [RPET 2000]            
  A)
                          Both will reach with same speed                             done clear
  B)
                          Both will reach with same acceleration             done clear
  C)
                          Both will reach in same time             done clear
  D)
                          None of above done clear
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