Question

is force needed to move a body with constant velocity​

Answer 1

Explanation:

Newton's first law- no force is needed for an object to move in a straight line at a constant speed. This is a constant velocity vector. Rest is a zero length constant velocity vector.

Answer 2

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A body is to be moved with a constant velocity. So, its velocity should not change. When velocity does not change, acceleration is zero. Hence, no force is required to move an object with constant velocity.