Question

What an object is said to be at rest when its position to surroundings does not change?​

Answer 1

Answer:

In physics, the 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 of surrounding does not change with time is said to be 'at rest'.

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From shivi......

Answer 2

Answer:

the object is said to be at rest

the answer is it's a stationary object