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4. Four person sitting in the back seat of a car at rest, is pushing on the front seat. a) Does the car move. Why. b) State the law which help you to answer the above question. c) Give the significance of the law. d) Long jumpers take a long run before a jump. Why.

a) The car does not move. The movement of the car is possible only
after pushing the outside of the car.
b) The above answer is based on the Newton's first law of motion.
c) According the the law, An object that is at rest will stay at rest unless an external
force acts upon it.
d) Long jumpers take a long run based on the law of inertia, so that they cross a
long distance. According to the law, a body will preserve its velocity and direction
so long as no force in its motion's direction acts on it.


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