8th Class Science Force and Pressure Question Bank

done Force and Pressure Total Questions - 78

• question_answer1)
  Force is a
  A)
  push                 done clear
  B)
  pull done clear
  C)
  both (a) and (b) done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer2)
  1 newton = _______ dynes.
  A)
  103                   done clear
  B)
  104 done clear
  C)
  105                   done clear
  D)
  106 done clear
  View Solution play_arrow

• question_answer3)
  The CGS unit of force is
  A)
  newton            done clear
  B)
           pascal done clear
  C)
  dyne                 done clear
  D)
           None of these done clear
  View Solution play_arrow

• question_answer4)
  Which of the following is an example of contact force?
  A)
  Magnetic force done clear
  B)
           Gravitational force done clear
  C)
  Electric force    done clear
  D)
  Muscular force done clear
  View Solution play_arrow

• question_answer5)
  Force per unit area is _______.
  A)
  thrust                 done clear
  B)
           pressure done clear
  C)
  buoyancy                     done clear
  D)
  density done clear
  View Solution play_arrow

• question_answer6)
  As we go to the higher altitude the atmospheric pressure _______.
  A)
  increases       done clear
  B)
  remain same done clear
  C)
  decreases                     done clear
  D)
  cannot say done clear
  View Solution play_arrow

• question_answer7)
  Pascal is equal to:
  A)
  \[\text{N/}{{\text{m}}^{\text{2}}}\] done clear
  B)
                       \[\text{N/m}\times \text{s}\] done clear
  C)
  \[\text{N/c}{{\text{m}}^{\text{2}}}\]                      done clear
  D)
  \[\text{N}\text{.}{{\text{m}}^{\text{2}}}\] done clear
  View Solution play_arrow

• question_answer8)
  Two stones A and B of masses 2 kg and 5 kg respectively are released from same height in vacuum. Which will reach on the ground first?
  A)
  Stone A done clear
  B)
  Stone B done clear
  C)
  Both will reach at same time done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer9)
  Pressure is directly proportional to
  A)
  density done clear
  B)
  height/depth done clear
  C)
  acceleration due to gravity done clear
  D)
  all of these done clear
  View Solution play_arrow

• question_answer10)
  Electrostatic force is a
  A)
  contact force done clear
  B)
           non-contact force done clear
  C)
  balanced force done clear
  D)
  unbalanced force done clear
  View Solution play_arrow

• question_answer11)
  When a force of 10 N is applied on a body it starts moving with a constant acceleration of2 m/s2. The mass of the body is
  A)
  2kg                               done clear
  B)
  0.2kg done clear
  C)
  20kg                             done clear
  D)
  5kg done clear
  View Solution play_arrow

• question_answer12)
  When a cricketer catches the ball by his hands the force/forces coming in action is/are
  A)
  non-contact force         done clear
  B)
  gravitational force done clear
  C)
  frictional force  done clear
  D)
  both (b) and (c) done clear
  View Solution play_arrow

• question_answer13)
  A stone falling from the roof of a house due to
  A)
  gravitational force done clear
  B)
  magnetic force done clear
  C)
  frictional force  done clear
  D)
  electrostatic force done clear
  View Solution play_arrow

• question_answer14)
  Force has
  A)
  only direction   done clear
  B)
  only magnitude done clear
  C)
  both magnitude and direction done clear
  D)
  neither magnitude nor direction done clear
  View Solution play_arrow

• question_answer15)
  The SI unit of force is
  A)
  newton      done clear
  B)
  dyne done clear
  C)
  pascal             done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer16)
  Which instrument is used for measuring at mospheric pressure?
  A)
  Hygrometer                  done clear
  B)
  Barometer done clear
  C)
  Hydrometer done clear
  D)
  Sphygmomanometer done clear
  View Solution play_arrow

• question_answer17)
  A fluid is a substance that
  A)
  has no definite shape done clear
  B)
  has no definite volume and shape done clear
  C)
  has no definite volume done clear
  D)
  is a liquid done clear
  View Solution play_arrow

• question_answer18)
  A mass of 2 kg is accelerated at 2 m/sec2. Find the force applied on it.
  A)
  4N                               done clear
  B)
  N done clear
  C)
  8N                               done clear
  D)
  N done clear
  View Solution play_arrow

• question_answer19)
  A stone of mass 4 kg is dropped from a height. Find the force exerted by it on ground if acceleration due to gravity is 10 m/s2.
  A)
  20 N                            done clear
  B)
  2.5 N done clear
  C)
  40 N                done clear
  D)
  0.4 N done clear
  View Solution play_arrow

• question_answer20)
  How much pressure will be applied on a body. If a force of 4 N is applied on its unit surface area. [Hint: Area = 1 m2]
  A)
  0.25 Pa                        done clear
  B)
  2 Pa done clear
  C)
  8 Pa                             done clear
  D)
  4 Pa done clear
  View Solution play_arrow

• question_answer21)
  A force of 12 N is acting perpendicular on a wooden block. What will be the thrust on it?
  A)
  12 N      done clear
  B)
           24 N done clear
  C)
  48 N                            done clear
  D)
  6N done clear
  View Solution play_arrow

• question_answer22)
  Pressure is the ratio of force to the ____over which it is applied.
  A)
  surface                         done clear
  B)
  volume done clear
  C)
  distance                       done clear
  D)
  area done clear
  View Solution play_arrow

• question_answer23)
  Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column I	Column II
  A. Thrust	(p) F/A
  B. Pressure	(q) Force
  C. Atmospheric pressure	(r) Decrease with altitude
  D. liquid pressure	(s) Monometer

  A)
  \[A\to (q);B\to (p);C\to (r);D\to (s)\] done clear
  B)
  \[A\to (r);B\to (p);C\to (q);D\to (s)\] done clear
  C)
  \[A\to (p);B\to (r);C\to (s);D\to (q)\] done clear
  D)
  \[A\to (s);B\to (q);C\to (p);D\to (r)\] done clear
  View Solution play_arrow

• question_answer24)
  Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column I	Column II
  A. Force	(p) unit of force
  B. Contact force	(q) magnetic force
  C. Non-contact force	(r) frictional force
  D. Newton	(s) mass\[\times \]acceleration

  A)
  \[A\to (q);B\to (p);C\to (r);D\to (s)\] done clear
  B)
  \[A\to (r);B\to (p);C\to (q);D\to (s)\] done clear
  C)
  \[A\to (p);B\to (r);C\to (s);D\to (q)\] done clear
  D)
  \[A\to (s);B\to (r);C\to (q);D\to (p)\] done clear
  View Solution play_arrow

• question_answer25)
  Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column I	Column II
  A. Acceleration	(p) Contact force
  B. Pressure	(q) No atmospheric pressure
  C. Space	(r) Force/mass
  D. Muscular force	(s) Barometer

  A)
  \[A\to (q);B\to (p);C\to (r);D\to (s)\] done clear
  B)
  \[A\to (r);B\to (s);C\to (q);D\to (p)\] done clear
  C)
  \[A\to (p);B\to (r);C\to (s);D\to (q)\] done clear
  D)
  \[A\to (s);B\to (r);C\to (q);D\to (p)\] done clear
  View Solution play_arrow

• question_answer26)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by\[P=\rho gh\]where, \[\rho \] is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. The new pressure at the bottom is
  A)
  4 P                   done clear
  B)
  2 P done clear
  C)
  1.5 P done clear
  D)
  3P done clear
  View Solution play_arrow

• question_answer27)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by\[P=\rho gh\]where, \[\rho \] is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. If half of the water is taken out, what is the pressure at the bottom?
  A)
  P                      done clear
  B)
  \[\frac{1}{2}P\] done clear
  C)
  \[\frac{3}{2}P\]                      done clear
  D)
  2P done clear
  View Solution play_arrow

• question_answer28)
  DIRECTIONS: Read the passage given below and answer the questions that follow. Passage Liquid pressure in a container doesn't depend on the shape of the container but it any depends on the height of the liquid column. The pressure due to a liquid at a point at a depth h from the surface of the liquid is given by\[P=\rho gh\]where, \[\rho \] is the density of the liquid and g is the acceleration due to gravity. A cylindrical container is full of water. The pressure at the bottom is P. Now, the water is replaced by cooking oil of density twice the density of water. If the container is carried on a mountain then what will be the pressure at the bottom?
  A)
  less than P       done clear
  B)
  more than P done clear
  C)
  equal to P         done clear
  D)
           None of these done clear
  View Solution play_arrow

• question_answer29)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Steel nails are pointed at one end to have least area of contact with surface. Reason: Least area exerts high pressure.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer30)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Magnetic force is a non-contact force. Reason: Unlike poles of magnet attracts each other.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer31)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: A moving toy car stops after a little distance. Reason: Friction opposes the motion.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer32)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Apple falls on the ground, due to gravitational force. Reason: Gravitational force is a contact force.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer33)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Sea divers wear special suits. Reason: There is no effect of gravity under the sea.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer34)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Fluid exerts pressure on the walls of container. Reason: Fluids have definite shape and size.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer35)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: There is high atmospheric pressure in the space. Reason: Astronauts wear special suits.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer36)
  Direction: The questions in this segment consist of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: When a stone is thrown vertically upward, after getting a certain height' it comes back to the earth. Reason: Stone has to work against the force of friction of air.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true but R is not the correct explanation of A. done clear
  C)
  A is true but R is false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer37)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. Statement-1: When one body moves or tries to move on the surface of another body, its speed continuously decreases. Statement-2: Friction is a contact force.
  A)
  Statement (1) is correct while statement (2) is incorrect. done clear
  B)
  Statement (2) is correct while statement (1) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer38)
  DIRECTIONS: Read the following two statements carefully and choose the correct options. Statement-1: Atmospheric pressure increases with increase in depth of sea. Statement-2: Pressure is directly proportional to depth/height.
  A)
  Statement (1) is correct while statement (2) is incorrect. done clear
  B)
  Statement (2) is correct while statement (1) is incorrect. done clear
  C)
  Both statements are correct done clear
  D)
  Both statements are incorrect. done clear
  View Solution play_arrow

• question_answer39)
  Wooden block will
  A)
  move in the direction of force A done clear
  B)
  move in the direction of force B done clear
  C)
  not move          done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer40)
  Which point have more pressure in the container?
  A)
  point A            done clear
  B)
           point B done clear
  C)
  point C                        done clear
  D)
  point D done clear
  View Solution play_arrow

• question_answer41)
            Container and , contain pure water but in different quantity. If both of the containers have same shape, same size and kept at same surface but height from the ground \[{{h}_{1}}>{{h}_{2}}.\] Which container will have more pressure?
  A)
  Same in A and B         done clear
  B)
  Container B done clear
  C)
  Container A      done clear
  D)
          None of these done clear
  View Solution play_arrow

• question_answer42)
  A wooden block is placed on a table. It exerts a force of 80 N on the table. If the base area of block is 2 m2 then what will be the pressure on the table?
  A)
  160 Pa done clear
  B)
           80 Pa done clear
  C)
  40 Pa   done clear
  D)
  240 Pa done clear
  View Solution play_arrow

• question_answer43)
  Opening a door is an example of
  A)
  contact force done clear
  B)
           non-contact force done clear
  C)
  magnetic force done clear
  D)
  balanced force done clear
  View Solution play_arrow

• question_answer44)
  When a body is said to be under balanced forces then the resultant force applied on the body is
  A)
  one                  done clear
  B)
           infinite done clear
  C)
  zero     done clear
  D)
           none of these done clear
  View Solution play_arrow

• question_answer45)
  Two bodies of masses m and 6m are moving under same magnitude of force. The ratio of their accelerations will be
  A)
  1 : 6                 done clear
  B)
           6 : 1 done clear
  C)
  1 : 36               done clear
  D)
           36 : 1 done clear
  View Solution play_arrow

• question_answer46)
  The pressure of the water at the bottom of the pond is _______ at the surface of the pond.
  A)
  lower than        done clear
  B)
           same done clear
  C)
  higher than done clear
  D)
  either lower or higher done clear
  View Solution play_arrow

• question_answer47)
  If a pressure of 8 Pa acts on the surface of area2m2, then the force acting on the surface is
  A)
  10 dynes           done clear
  B)
           4.00 N done clear
  C)
  16N           done clear
  D)
  4.00 dynes done clear
  View Solution play_arrow

• question_answer48)
  The pressure exerted by a column of liquid is independent of the ______.
  A)
  density of the liquid done clear
  B)
  weight of the liquid done clear
  C)
  depth of the liquid done clear
  D)
  shape of the container done clear
  View Solution play_arrow

• question_answer49)
  A force \[{{F}_{1}}\] acting on a body of 2 kg produces an acceleration of 2.5 m/sec2. Another force \[{{F}_{2}}\]acting on the body of mass 5 kg produces an acceleration of 2 m/sec2. Find the ratio of\[{{F}_{2}}/{{F}_{1}}.\]
  A)
  2                      done clear
  B)
           4 done clear
  C)
  6                                  done clear
  D)
  8 done clear
  View Solution play_arrow

• question_answer50)
  An astronaut with all her equipment has a mass of 95 kilograms. How much will the weight on the moon, where the acceleration due to gravity is \[1.67\,\text{m}{{\text{s}}^{-2}}?\]
  A)
  159 N  done clear
  B)
           169 N done clear
  C)
  149 N             done clear
  D)
  100 N done clear
  View Solution play_arrow

• question_answer51)
  What force is needed to a accelerate a 60 kg wagon from rest to \[5.0\,\text{m}{{\text{s}}^{-2}}\] in 2.0 seconds?
  A)
  100 N             done clear
  B)
  120 N done clear
  C)
  150 N          done clear
  D)
  130 N done clear
  View Solution play_arrow

• question_answer52)
  A 500 kg rocket is fired straight up from the earth, the engine providing 7500 newton of thrust. Its acceleration is
  A)
  4.5 m/s2           done clear
  B)
  5.2 m/s2 done clear
  C)
  9.8 m/s2           done clear
  D)
  15 m/s2 done clear
  View Solution play_arrow

• question_answer53)
  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
  View Solution play_arrow

• question_answer54)
  What force would be required to produce an acceleration of 4 m/s2 in a moving wall of mass6kg?
  A)
  1.2 N               done clear
  B)
  1.5 N done clear
  C)
  24 dynes           done clear
  D)
           24 N done clear
  View Solution play_arrow

• question_answer55)
  Two forces 200 N and 300 N acting on a body in same direction. What is resultant force?
  A)
  1.5 N               done clear
  B)
           100 N done clear
  C)
  0.66 N            done clear
  D)
  500 N done clear
  View Solution play_arrow

• question_answer56)
  What will be the change in acceleration of as liding brick, if its mass is doubled, while a constant force is acting on it. Acceleration will be
  A)
  2a                    done clear
  B)
           a/2 done clear
  C)
  a/4                               done clear
  D)
  4a done clear
  View Solution play_arrow

• question_answer57)
  A car of mass 1000 kg can produce an acceleration of 8 m/s2.Calculate the force produced by the engine ignoring friction.
  A)
  10,000 N          done clear
  B)
           100,000 N done clear
  C)
  8000 N           done clear
  D)
  18000N done clear
  View Solution play_arrow

• question_answer58)
  When an object is at rest on a surface - what canbe said about the forces on it?
  A)
  they all are equal done clear
  B)
  they are unbalanced done clear
  C)
  there are not acting on it done clear
  D)
  all the forces cancel out done clear
  View Solution play_arrow

• question_answer59)
  What is the surface area of table top if a force of120 N exerted on it produces a pressure of20 Pa?
  A)
  2400m2            done clear
  B)
  60m2 done clear
  C)
  6m2                  done clear
  D)
  240m2 done clear
  View Solution play_arrow

• question_answer60)
  The pressure at a point in a liquid is proportional to the________ of the liquid and the depth of the point.
  A)
  density done clear
  B)
           force done clear
  C)
  area done clear
  D)
  gravitational acceleration done clear
  View Solution play_arrow

• question_answer61)
  Gaurav wants to accelerate a body of mass2 kg at 10 m/sec2. On the other hand, Sahil wants to get accelerate a body of mass 5 kg at 2.5m/sec2. Who will need to apply more force?
  A)
  both will apply same force done clear
  B)
  Gaurav done clear
  C)
  Sahil done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer62)
  Stones A, B, C and D of same masses are thrown on a wall. Acceleration produced in them are \[2m/se{{c}^{2}},\text{ }3\text{ }m/se{{c}^{2}},\text{ }5\text{ }m/se{{c}^{2}},\text{ }4\text{ }m/se{{c}^{2}}\] respectively. Arrange the force exerted by the stones in descending order.
  A)
  \[{{f}_{A}}>{{f}_{B}}>{{f}_{C}}>{{f}_{D}}\] done clear
  B)
           \[{{f}_{D}}>{{f}_{C}}>{{f}_{B}}>{{f}_{A}}\] done clear
  C)
  \[{{f}_{A}}>{{f}_{B}}>{{f}_{D}}>{{f}_{C}}\]           done clear
  D)
  \[{{f}_{C}}>{{f}_{D}}>{{f}_{B}}>{{f}_{A}}\] done clear
  View Solution play_arrow

• question_answer63)
  Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  A.\[dyne/c{{m}^{2}}\]	(p) 760 mm of Hg
  B. 76 cm of Hg	(q)\[N{{m}^{-2}}\]
  C. 1 Pa	(r)\[1.013\times {{10}^{-5}}N{{m}^{-2}}\]
  D. 1 Pa	(s)\[{{10}^{-1}}N{{m}^{-2}}\]

  A)
  \[A\to (q);B\to (p);C\to (r);D\to (s)\] done clear
  B)
  \[A\to (r);B\to (p);C\to (q);D\to (s)\] done clear
  C)
  \[A\to (p);B\to (r);C\to (s);D\to (q)\] done clear
  D)
  \[A\to (s);B\to (p);C\to (q);D\to (r)\] done clear
  View Solution play_arrow

• question_answer64)
  Directions: Match Column-I with Column-II and select the correct answer using the codes given below the columns.

  Column - I	Column - II
  A. Fielder sloping a ball	(p) Lifting
  B. Opening a door	(q) Muscular force
  C. Shutting a door	(r) Pulling
  D. Drawing a bucket of water from a well	(s) pushing

  A)
  \[A\to (q);B\to (p);C\to (r);D\to (s)\] done clear
  B)
  \[A\to (r);B\to (p);C\to (q);D\to (s)\] done clear
  C)
  \[A\to (q);B\to (r);C\to (s);D\to (p)\] done clear
  D)
  \[A\to (s);B\to (r);C\to (q);D\to (p)\] done clear
  View Solution play_arrow

• question_answer65)
  DIRECTIONS: Read the passage given below and answer the questions that/allow. Passage Pressure is defined as the force exerted over a unit of area. \[\text{Pressure}\,\text{=}\frac{\text{force}}{\text{area}}\] Place a book on a bathroom scale and, whether you place it on its back, on its side, or balanced on a corner, it still exerts the same force. The weight reading is the same. Now balance the book on the palm of your hand and you sense a difference - the pressure of the book depends on the area over which the force is distributed. Which book will exert more pressure?
  A)
  Book 1             done clear
  B)
  Book 2 done clear
  C)
  Both exert equal pressure done clear
  D)
  Can't be determined done clear
  View Solution play_arrow

• question_answer66)
  DIRECTIONS: Read the passage given below and answer the questions that/allow. Passage Pressure is defined as the force exerted over a unit of area. \[\text{Pressure}\,\text{=}\frac{\text{force}}{\text{area}}\] Place a book on a bathroom scale and, whether you place it on its back, on its side, or balanced on a corner, it still exerts the same force. The weight reading is the same. Now balance the book on the palm of your hand and you sense a difference - the pressure of the book depends on the area over which the force is distributed. If a force of 20N is applied on the surface of area 0.1 m2 then pressure experienced is
  A)
  5N/m2  done clear
  B)
           100 N/m2 done clear
  C)
  200 N/m2         done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer67)
  Directions: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: The acceleration produced by a force in the motion of a body depends only up on its mass. Reason: Larger is the mass of the body, lesser will be the acceleration produced.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true and but R is not the correct explanation of A. done clear
  C)
  A is true but R is a false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer68)
  Directions: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: If the net external force on the body is zero, then its acceleration is zero. Reason: Acceleration does not depend on force.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true and but R is not the correct explanation of A. done clear
  C)
  A is true but R is a false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer69)
  Directions: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: An object can move with constant velocity if no net force acts on it. Reason: No net force is needed to move an object with constant velocity.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true and but R is not the correct explanation of A. done clear
  C)
  A is true but R is a false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer70)
  Directions: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reasons R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: A body is momentarily at rest when it reverses the direction. Reason: A body cannot have acceleration if its velocity is zero at a given instant of time.
  A)
  Both A and R are true and R is the correct explanation of A. done clear
  B)
  Both A and R are true and but R is not the correct explanation of A. done clear
  C)
  A is true but R is a false. done clear
  D)
  A is false but R is true. done clear
  View Solution play_arrow

• question_answer71)
  DIRECTIONS: Read the following three statements carefully and choose the correct option. Statement-1: It is easier to push a nail into a wooden box by the pointed end. Statement-2: Nail's head is easier to hit. Statement-3: Pressure applied on all nails is same whatever is their size.
  A)
  Statement (1) and (3) are incorrect while statement (2) is correct. done clear
  B)
  Statement (1) and (2) are incorrect while (3) is correct. done clear
  C)
  All the statements are correct. done clear
  D)
  All the statements are incorrect. done clear
  View Solution play_arrow

• question_answer72)
  DIRECTIONS: Read the following three statements carefully and choose the correct option. Statement-1: Porters place a round piece of cloth on their heads. Statement-2: Pressure is inversely proportional to area on which it acts. Statement-3: Pressure is independent of area of surface in contact.
  A)
  Statement (1) and (3) are incorrect while statement (2) is correct. done clear
  B)
  Statement (1) and (2) are incorrect while (3) is correct. done clear
  C)
  All the statements are correct. done clear
  D)
  All the statements are incorrect. done clear
  View Solution play_arrow

• question_answer73)
  In which condition the wooden block will move?
  A)
  A                                  done clear
  B)
  B done clear
  C)
  Both A and B               done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer74)
  Rajiv pulls a wooden box from one end with a force of 20 N, and Saurabh starts pushing the same box from opposite end with a force of 15N. If a resultant acceleration of 2m/sec2 creates in the wooden box. Find the mass of the wooden box. (Hint: Resultant of the force in the same direction is addative)
  A)
  5kg                   done clear
  B)
  70kg done clear
  C)
  2.5kg                            done clear
  D)
  17.5kg done clear
  View Solution play_arrow

• question_answer75)
  Twinkle throws a stone of mass 1 kg in vertically upward direction. Its velocity continuously decreases. After attaining a certain height its velocity becomes zero and it starts falling towards earth under gravitational force. If the acceleration due to gravity working on it is10 m/sec2. Then, how much force will it exert on ground, when it will strike to the ground?
  A)
  10 N                done clear
  B)
           20 N done clear
  C)
  N                     done clear
  D)
  100 N done clear
  View Solution play_arrow

• question_answer76)
  Rahul starts drilling a steel nail in a wooden block with its sharp side. The area of sharp side is 0.1 m2. He applies a force of2N on it. How much pressure will the nail exert on the wooden block?
  A)
  Pa                    done clear
  B)
           0.2 Pa done clear
  C)
  20 Pa               done clear
  D)
  200 Pa done clear
  View Solution play_arrow

• question_answer77)
  The diagram below shows two dogs pulling on a rope with constant but unequal forces. In which compass direction will both dogs most likely move?
  A)
  east             done clear
  B)
           west done clear
  C)
  north             done clear
  D)
           south done clear
  View Solution play_arrow

• question_answer78)
  Name the device in the diagrams used to measure force.
  A)
  spring scale      done clear
  B)
  voltmeter done clear
  C)
  thermometer    done clear
  D)
  graduated cylinder done clear
  View Solution play_arrow