Question

1. an object experiences is net zero external unbalanced force. is it possible for the object to be travelling with a non zero velocity? if yes, state the conditions that must be placed on the magnitude and direction of the velocity. if no, provide a reason.

2. when a carpet is beaten with a stick, dust comes out of it. explain.

class 9 questions of physics
chapter- force and laws of motion​

Answer 1

Explanation:

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Answer 2

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• Yes,It is possible for a object to be travelling with a non zero velocity,if it experience a net zero external unbalanced force.if body is initally moving with some velocity on a smooth surface,then it will continue to move with same velocity,though the net external force acting on the body is zero.For examole, When we stop pedaling a moving bicycld,the bicycle begins to slow down and finally comes to rest.

• When the carpet is beaten,it is suuddenly come into motion.The dust particles tend to remain in rest due to inertia of rest,therefore,dust comes out of it.

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