41. An object at rest may have
42. Which conservation principle is applicable in the case of the motion of a rocket?
43. Rocket works on the principle of
44. A passenger standing in a bus is thrown outward when the bus takes a sudden turn. This happens due to
45. When a running car stops suddenly, the passengers tends to lean forward because of:
46. A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
47. Who defined the law of gravitation ?
48. It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
49. In the Earth, the weight of a body is maximum at the
50. A person is hurt on kicking a stone due to
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