Question

when a body is said to be rest?

Answer 1

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

Answer 2

Answer:

In physics, rest is the state 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".

rest : Is when a body is not moving/ the object is still.