51. The velocity of a car increases uniformly from 18 kmh-1 to 36 kmh-1 in 5sec. Calculate the acceleration of the car.
52. A bullet of mass 10 g is fired with a velocity of 20 m/s from a gun of mass 2 kg. Find the recoil velocity (in m/s) of the gun.
53. If 20 N force is applied on an object of mass 10 kg, what will be the acceleration?
54. Kiran swims in a 90 m long pool. She covers 360 m in two turns by swimming from one end to the other and back along the same position of straight path. Find the average velocity of Kiran.
55. The tendency of an object to resist change in static or dynamic condition is called-
56. When net torque is zero, . . . . . . . . will be constant.
57. The law of inertia was propounded by
58. The acceleration of an object is the change in its . . . . . . . . per unit time.
59. The second equation of motion gives the relation between
60. Rocket works on the principle of
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