Question

what is relative velocity

Answer 1

Definition of relative velocity. : the vector difference between thevelocities of two bodies : the velocityof a body with respect to another regarded as being at rest — comparerelative motion.

Answer 2

Relative velocity is a measurement of velocity between two objects moving in different frames of reference. Relative velocity is an essential area of both classical and modern physics, since nearly all non-trivial problems in physics deal with the relative velocity of two or more particles. It is especially important in special relativity where there is no such thing as absolute motion, thus making all motion and therefore velocities relative. Since velocity is the change in position with respect to time, two velocities, v and w could be alternatively written as the derivative of the position with respect to time.