Question

How the momentum remains constant in uniform circular motion

Answer 1

Accelerating objects are objects which are changing their velocity - either the speed (i.e., magnitude of the velocity vector) or the direction. An object undergoing uniform circular motion is moving with a constant speed. Nonetheless, it is accelerating due to its change in direction.

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Answer 2

in uniform circular motion .....the linear momentum of the body changes due to change in the direction of linear velocity.The Angular momentum is constant because the angular velocity w=v/r is constant