Question

when is a body in a state of motion

Answer 1

Hey mate here is your answer

Such an object will not change its state of motion (i.e., velocity) unless acted upon by an unbalanced force. Objects resist changes in their velocity. As learned in an earlier unit, an object that is not changing its velocity is said to have an acceleration of 0 m/s/s.

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Answer 2

it happens when object covers distance with respect to time