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1) The resultant of all the forces acting on body is a. net force b. normal force c. perpendicular force d. equilibrium
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2) As compare to sliding friction, the rolling friction is a. lesser b. greater c. equal d. always negative
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3) If a body is moving in a straight line then net force acting on it is a. constant b. increasing c. decreasing d. zero
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4) Centripetal reaction that pulls the string outward is sometimes called the a. centrifugal force b. gravitational force c. dynamic force d. translatory force
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5) The weight of a body is 150 N. Its mass will be a. 10 kg b. 15 kg c. 18 kg d. 20 kg
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6) When donkey pulls a cart, the action is on the a. cart b. donkey c. earth d. earth and cart
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7) A force acting on a body of mass 7 kg produces an acceleration of 10 ms−2. The acceleration that the same force will produce in a body of mass 9 kg will be a. 5 ms−2 b. 6 ms−2 c. 6.5 ms−2 d. 7.7 ms−2
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8) The body jumps out of a moving van. There is a danger for him to fall in a. towards the moving van b. away from the van c. direction of motion d. under the van
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9) Two masses 4.5 kg and 3.8 kg are attached to the ends of an inextensible string passes over a frictionless pulley. Its acceleration when both masses are moving vertically will be equal to a. 0.8 ms−2 b. 0.5 ms−2 c. 2 ms−2 d. 1.5 ms−2
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10) When a force acts on a body, it produces an acceleration in the body and will be equal to the rate of change of a. velocity of the body b. displacement of the body c. inertia of the body d. momentum of the body
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11) The force that keeps a body to move in a circle is known as a. centrifugal force b. gravitational force c. dynamic force d. centripetal force
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12) The shape and size of a body on which action takes place can also be changed due to a. velocity b. momentum c. force d. weight
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13) The resultant of all the forces acting on a body is called a. net force b. net friction c. net velocity d. net momentum
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14) The quantity of motion a body possesses due to its mass and velocity is called a. acceleration b. force c. inertia d. momentum
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15) If we make the sliding surfaces smooth by lubricating etc. the friction can be a. increase b. dangerous c. reduce d. all of above
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16) To push the ground backwards and walk, the force needed is a. gravitational force b. friction c. retarding force d. resultant force
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17) The momentum of an isolated system always remains a. constant b. zero c. high d. low
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