Question

How do we know if an object is in motion?

Answer 1

Answer:

An object is in motion when its distance from another object is changing. Whether an object is moving or not depends on your point of view. ... An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.

Answer 2

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An object is in motion when its distance from another object is changing. Whether an object is moving or not depends on your point of view. An object is in motion if it changes position relative to a reference point. You assume that the reference point is stationary, or not moving.