Question

what is definition of rest​

Answer 1

An object is said to be in rest , if its position is not changing in respect to time with a reference point.

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Answer 2

$\pink { \tt{Mr \: phenomenal \: }}$

Rest: If a body does not change its position with respect to its surroundings, the body is said to be at rest. E.g. A table lying in a room is at rest with respect to the walls of the room. Motion: A body is said to be in motion if it changes its position with respect to its surroundings.