Banking Physics Wave Mechanics Question Bank

done Mechanics Total Questions - 56

• question_answer1)
  Light year is
  A)
  Light emitted by the sun in one year. done clear
  B)
  Time taken by light to travel from sun to earth. done clear
  C)
  The distance travelled by light in free space in one year.   done clear
  D)
  Time taken by earth to go once around the sun. done clear
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• question_answer2)
  A passenger in a moving train tosses a coin. If the coin falls behind him, the train must be moving with
  A)
   An acceleration   done clear
  B)
   a deceleration done clear
  C)
   A uniform speed  done clear
  D)
          any of the above done clear
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• question_answer3)
  Watt-hour meter measures
  A)
   current                          done clear
  B)
   voltage done clear
  C)
   power              done clear
  D)
          electric energy   done clear
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• question_answer4)
  Which of the following time-displacement graph is not possible in nature?
  A)
                   done clear
  B)
      done clear
  C)
       done clear
  D)
     done clear
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• question_answer5)
  A car is moving on a road and rain is falling vertically. Select the correct answer.
  A)
   The rain will strike the wind screen only done clear
  B)
   The rain will strike the front screen only   done clear
  C)
   The rain will strike both the screens done clear
  D)
   The rain will not strike any of the screens done clear
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• question_answer6)
  SI unit of pressure is
  A)
   atmosphere                   done clear
  B)
   bar done clear
  C)
   pascal               done clear
  D)
          mm of Hg done clear
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• question_answer7)
  Dimensions of impulse are
  A)
   \[[ML{{T}^{-1}}]\]                    done clear
  B)
   \[[ML{{T}^{-2}}]\] done clear
  C)
   \[[M{{T}^{-2}}]\]          done clear
  D)
          \[[M{{L}^{-1}}{{T}^{-3}}]\] done clear
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• question_answer8)
  \[[M{{L}^{-2}}{{T}^{-2}}]\] are dimensions of
  A)
   force                done clear
  B)
          moment of force   done clear
  C)
   momentum         done clear
  D)
          power done clear
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• question_answer9)
  The number of significant figures in 0.00060 m is
  A)
   1                                             done clear
  B)
   2   done clear
  C)
   3                             done clear
  D)
         4 done clear
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• question_answer10)
  A particle is moving in a circular path of radius r. The displacement after half a circle would be
  A)
   zero                  done clear
  B)
   \[\pi r\] done clear
  C)
   \[2r\]                    done clear
  D)
          \[2\pi r\] done clear
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• question_answer11)
  The numerical ratio of average velocity to average speed is
  A)
   always less than one       done clear
  B)
   always equal to one done clear
  C)
   always more than one done clear
  D)
   equal to or less than one   done clear
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• question_answer12)
  A vector quantity is a physical quantity which needs
  A)
   magnitude                       done clear
  B)
   direction   done clear
  C)
   both [a] and [b]   done clear
  D)
          time done clear
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• question_answer13)
  Which of the following are examples of uniform velocity?
  A)
   Motion of moon around earth   done clear
  B)
   Motion of planet around sun   done clear
  C)
   Motion of car on crowded road done clear
  D)
   Motion of a moving fan done clear
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• question_answer14)
  A person swims in a river aiming to reach exactly on the opposite point on the bank of a river. His speed of swimming is 0.5 m/s at an angle of \[120{}^\circ \] with the direction of flow of water. The speed of water is
  A)
   1.0 m/s                         done clear
  B)
   0.5 m/s done clear
  C)
   0.25 m/s              done clear
  D)
          0.43 m/s done clear
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• question_answer15)
  When a body is stationary
  A)
   there is no force acting on it done clear
  B)
   the force acting on it not in contact with it done clear
  C)
   the combination of forces acting on it balances each other   done clear
  D)
   the body is in vacuum done clear
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• question_answer16)
  Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in figure. Choose the correct statement.
  A)
   Car A is faster than car D done clear
  B)
   Car B is the slowest.   done clear
  C)
   Car C is faster than car D.   done clear
  D)
   Car C is the lowest. done clear
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• question_answer17)
  A man getting down a running bus, falls forward because
  A)
   due to inertia of rest, road is left behind and man reaches forward done clear
  B)
   due to inertia of motion upper part of body continues to be in motion in forward direction while feet come to rest as soon as they touch the road done clear
  C)
   he leans forward as a matter of habit done clear
  D)
   of the combined effect of all the three factors stated in [a], [b] and [c] done clear
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• question_answer18)
  The relative velocity \[{{v}_{AB}}\]or \[{{v}_{BA}}\] of two bodies A and B may be

  (1) greater than velocity of body A

  (2) greater than velocity of body B

  (3) less than the velocity of body A

  (4) less than the velocity of body B

  A)
   (1) and (2) only done clear
  B)
   (3) and (4) only done clear
  C)
   (1), (2) and (3) only done clear
  D)
   (1), (2), (3) and (4).   done clear
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• question_answer19)
  A parrot is sitting on the floor of a closed glass cage which is in a boy's hand. If the parrot starts flying with a constant speed, the boy will feel the weight of the cage as
  A)
   unchanged                      done clear
  B)
   reduced done clear
  C)
   increased           done clear
  D)
          nothing can be said done clear
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• question_answer20)
  A cannon after firing recoils due to
  A)
   conservation of energy done clear
  B)
   backward thrust of gases produced done clear
  C)
   Newton's third law of motion   done clear
  D)
   Newton's first law of motion done clear
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• question_answer21)
  The force exerted by the floor of an elevator on the foot of a person standing there, is more than his weight, if the elevator is
  A)
   going down and slowing down done clear
  B)
   going up and speeding up   done clear
  C)
   going up and slowing down done clear
  D)
   either [a] or [b] done clear
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• question_answer22)
  Consider an elevator moving downwards with an acceleration a, the force exerted by a passenger of mass m on the floor of the elevator is
  A)
   \[ma\]                           done clear
  B)
   \[ma-mg\] done clear
  C)
   \[mg-ma\]            done clear
  D)
          \[mg+ma\] done clear
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• question_answer23)
  A large truck and a car, both moving with a velocity of same magnitude have a head-on-collision. Car suffers more damage than the truck. This is because
  A)
   the material used in car is inferior than the material used in truck. done clear
  B)
   car experience the greater force of impact than the truck.   done clear
  C)
   momentum transferred to the truck is greater than the momentum transferred to the car. done clear
  D)
   momentum transferred to the car is greater than the momentum transferred to the truck.   done clear
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• question_answer24)
  Frictional force           
  A)
   always acts opposite to the direction of motion done clear
  B)
   always acts in the direction of motion done clear
  C)
   may act in the direction of motion   done clear
  D)
   always acts perpendicular to the direction of motion done clear
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• question_answer25)
  A coin is placed on a rotating disc and is stationary w.r.t. the disc, then the direction of friction is
  A)
   along the direction of motion of the coin w.r.t. ground done clear
  B)
   opposite to the direction of motion of the coin w.r.t. ground done clear
  C)
   towards the centre of the disc   done clear
  D)
   away from the centre of the disc done clear
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• question_answer26)
  A monkey is climbing up a rope, then the tension in the rope
  A)
   must be equal to the force applied by the monkey on the rope.   done clear
  B)
   must be less than the force applied by the monkey on the rope. done clear
  C)
   must be greater than the force applied by the monkey on the rope. done clear
  D)
   may be equal to, less than or greater the force applied by the monkey on the rope. done clear
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• question_answer27)
  Which of the following is NOT an illustration of Newton?s third law?
  A)
   Flight of a jet plane done clear
  B)
   A cricket player lowering his hands while catching a cricket ball   done clear
  C)
   Walking on floor done clear
  D)
   Rebounding of a rubber ball done clear
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• question_answer28)
  Swimming is possible on account of
  A)
   first law of motion done clear
  B)
   second law of motion done clear
  C)
   third law of motion   done clear
  D)
   Newton's law of gravitation done clear
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• question_answer29)
  1 kilowatt hour is equal to
  A)
   1 joule                          done clear
  B)
   100 joule done clear
  C)
   36 joule              done clear
  D)
          \[3.6\times {{10}^{3}}\]kilo joule   done clear
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• question_answer30)
  The centre of mass of triangle shown in figure has coordinates
  A)
   \[x=\frac{h}{2},y=\frac{b}{2}\]            done clear
  B)
   \[x=\frac{b}{2},y=\frac{h}{2}\] done clear
  C)
   \[x=\frac{b}{3},y=\frac{h}{3}\]          done clear
  D)
          \[x=\frac{h}{3},y=\frac{b}{3}\] done clear
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• question_answer31)
  For a body falling freely under gravity from a height
  A)
   only the potential energy goes on increasing done clear
  B)
   only the kinetic energy goes on increasing done clear
  C)
   both kinetic energy as well as potential energy go on increasing done clear
  D)
   the kinetic energy goes on increasing while potential energy goes on decreasing   done clear
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• question_answer32)
  A jet plane moves up in air because
  A)
   the gravity does not act on bodies moving with high speeds done clear
  B)
   the thrust of the jet compensates for the force of gravity   done clear
  C)
   the flow of air around the wings causes an upward force, which compensates for the force of gravity done clear
  D)
   the weight of air whose volume is equal to the volume of the plane is more than the weight of the plane          done clear
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• question_answer33)
  In an explosion, a body breaks up into two pieces of unequal masses. In this                                            
  A)
   both parts will have numerically equal momentum   done clear
  B)
   lighter part will have more momentum done clear
  C)
   heavier part will have more momentum done clear
  D)
   both parts will have equal kinetic energy done clear
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• question_answer34)
  For inelastic collisions between two spherical rigid bodies
  A)
   the total kinetic energy is conserved done clear
  B)
   the total mechanical energy is not conserved done clear
  C)
   the linear momentum is not conserved done clear
  D)
   the linear momentum is conserved   done clear
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• question_answer35)
   If a running boy jumps on a rotating table, which of the following is conserved?
  A)
   Linear momentum         done clear
  B)
   KJE done clear
  C)
   Angular momentum         done clear
  D)
   None of these done clear
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• question_answer36)
  A gymnast takes turns with her arms and legs stretched. When she pulls her arms and legs
  A)
   the angular velocity decreases done clear
  B)
   the moment of inertia decreases   done clear
  C)
   the angular velocity stays constant done clear
  D)
   the angular momentum increases done clear
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• question_answer37)
  Two bodies A and B have masses M and m respectively where M>m and they are at a distance d apart. Equal force is applied to them so that they approach each other. The position where they hit each other is
  A)
   nearer to B done clear
  B)
   nearer to A   done clear
  C)
   at equal distance from A and B done clear
  D)
   cannot be determined done clear
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• question_answer38)
  When a steady torque is acting on a body, the body
  A)
   continues in its state of rest or uniform motion along a straight line done clear
  B)
   gets linear acceleration done clear
  C)
   gets angular acceleration   done clear
  D)
   rotates at a constant speed done clear
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• question_answer39)
  A couple produces a
  A)
   pure linear motion done clear
  B)
   pure rotational motion   done clear
  C)
   no motion. done clear
  D)
   both linear and rotational motion done clear
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• question_answer40)
  A balloon filled with \[C{{O}_{2}}\] released on earth would (neglect viscosity of air)
  A)
   climb with an acceleration 9.8\[m/{{s}^{2}}\] done clear
  B)
   fall with an acceleration 9.8 \[m/{{s}^{2}}\] done clear
  C)
   fall with a constant acceleration 3.4\[m/{{s}^{2}}\]   done clear
  D)
   fall with acceleration and then would attain a constant velocity done clear
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• question_answer41)
  When a satellite is in the synchronous orbit above the equator, it stays in one place with reference to the earth by making each revolution in just the same time as it takes the earth to rotate once. What is the altitude of the synchronous orbit?
  A)
   20000km                      done clear
  B)
   30000km done clear
  C)
   32500km           done clear
  D)
          36000km   done clear
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• question_answer42)
  If the earth stops rotating about its axis, the acceleration due to gravity will remain unchanged at
  A)
   equator                         done clear
  B)
   latitude \[45{}^\circ \] done clear
  C)
   latitude \[60{}^\circ \]       done clear
  D)
          poles   done clear
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• question_answer43)
  Time period of a simple pendulum inside a satellite orbiting earth is
  A)
   zero                  done clear
  B)
   \[\infty \]   done clear
  C)
   T                     done clear
  D)
          2T done clear
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• question_answer44)
  The escape velocity of a body depends upon mass as
  A)
   \[{{m}^{0}}\]                           done clear
  B)
   \[{{m}^{1}}\] done clear
  C)
   \[{{m}^{2}}\]                 done clear
  D)
          \[{{m}^{3}}\] done clear
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• question_answer45)
  There is no atmosphere on the moon because
  A)
   it is closer to the earth and also it has the inactive inert gases in it. done clear
  B)
   it is too for from the sun and has very low pressure in its outer surface. done clear
  C)
   escape velocity of gas molecules is greater than their root mean square velocity done clear
  D)
   escape velocity of gas molecules is less than their root mean square velocity.   done clear
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• question_answer46)
  A missile is launched with a velocity less than escape velocity. The sum of its kinetic and potential energies is
  A)
   zero done clear
  B)
   negative   done clear
  C)
   positive done clear
  D)
   may be positive, negative or zero done clear
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• question_answer47)
  If the earth rotates faster than its present speed, the weight of an object will
  A)
   increase at the equator but remain unchanged at the poles done clear
  B)
   decrease at the equator but remain unchanged at the poles   done clear
  C)
   remain unchanged at the equator but decrease at the poles done clear
  D)
   remain unchanged at the equator but increase at the poles done clear
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• question_answer48)
  The maximum kinetic energy of a planet moving around the sun is at a position                  
  A)
   A                        done clear
  B)
          B              done clear
  C)
   C                      done clear
  D)
          D                            done clear
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• question_answer49)
  A man waves his arms while walking. This is to
  A)
   keep constant velocity done clear
  B)
   ease the tension done clear
  C)
   increase the velocity done clear
  D)
   balance the effect of earth's gravity   done clear
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• question_answer50)
  A ball is dropped from a satellite revolving round the earth at a height of 120 km. The ball will
  A)
   continue to move with same speed along a straight line tangentially to the satellite at that time. done clear
  B)
   continue to move with the same speed along the original orbit of satellite.   done clear
  C)
   fall down to earth gradually done clear
  D)
   go far away in space done clear
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• question_answer51)
  Two satellites of earth, \[{{S}_{1}}\], and \[{{S}_{2}}\] are moving in the same orbit. The mass of \[{{S}_{1}}\] is four times the mass of \[{{S}_{2}}\].Which one of the following statements is true?
  A)
   The potential energies of earth satellites in the two cases are equal. done clear
  B)
   \[{{S}_{1}}\] and \[{{S}_{2}}\] are moving with the same speed.   done clear
  C)
   The kinetic energy of the two satellites are equal. done clear
  D)
   The time period of \[{{S}_{1}}\] is four times that of \[{{S}_{2}}\] done clear
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• question_answer52)
  If suddenly the gravitational force of attraction between the earth and a satellite revolving around it becomes zero, then the satellite will
  A)
   continue to move in its orbit with same speed done clear
  B)
   move tangentially to the original orbit with same speed   done clear
  C)
   become stationary in its orbit done clear
  D)
   move towards the earth done clear
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• question_answer53)
  Which one of the following statements regarding artificial satellite of the earth is incorrect?
  A)
   The orbital velocity depends on the mass of the satellite   done clear
  B)
   A minimum velocity of 8 km/sec is required by a satellite to orbit quite close to the earth done clear
  C)
   The period of revolution is large if the radius of its orbit is large done clear
  D)
   The height of a geostationary satellite is about 36000 km from earth done clear
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• question_answer54)
  Kepler's second law (law of area) is nothing but a statement of
  A)
   work energy theorem done clear
  B)
   conservation of linear momentum done clear
  C)
   conservation of angular momentum   done clear
  D)
   conservation of energy done clear
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• question_answer55)
  A person sitting on a chair in a satellite feels weightless because
  A)
   the earth does not attract the objects in a satellite done clear
  B)
   the normal force by the chair on the person balances the earth's attraction done clear
  C)
   the normal force is zero   done clear
  D)
   the person in satellite is not accelerated done clear
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• question_answer56)
   A hole is drilled through the earth along the diameter and a stone is dropped into it. When the stone is at the centre of earth, it possesses
  A)
   weight              done clear
  B)
   mass   done clear
  C)
   acceleration         done clear
  D)
          potential energy done clear
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