Question

If zero relative velocity possible explain

Answer 1

The laws of physics which apply when you are at rest on the earth also apply when you are in any reference frame which is moving at a constant velocity with respect to the earth. For example, you can toss and catch a ball in a moving bus if the motion is in a straight line at constant speed.

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https://www.youtube.com/watch?v=sKiXeaM4pLc&t=8s