Question

what is momentum?? when can it remain constant??​

Answer 1

If an external force is acted on a body to move it, the body accelerates. So the momentum cannot be a constant.

But, if the force cannot make a body to move like push of a boy on a wall, The body remains at rest and the momentum of the body remains zero.

Answer 2

Answer:

Hey! Here Is Ur Ans

conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant

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