Question

what do you mean by a body at a rest​

Answer 1

Answer:

In physics, rest is the state of an object being stationary relative to a particular frame of reference or another object; when the position of a body with respect to its surroundings does not change with time it is said to be "at rest".

Explanation:

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Answer 2

Answer:

A body is said to be at rest when its position doesn't change with time.