Question

when is a object said to be in motion?​

Answer 1

Answer:

An object is moving if its position relative to a fixed point is changing. Even things that appear to be at rest move.

Answer 2

Answer:

An object is said to be in motion if it changes its position with time,with respect to its surroundings.(while an object is said to be at rest if it does not change its position with time with respect to its surroundings).

A boy is running is said to be in motion.

Rotary motion is turning round in a circle, such as a wheel turning.Linear motion is moving in a straight line, such as on a paper trimmer.Reciprocating motion is moving backwards and forwards in a straight line, as in cutting with a saw.