Question

what is relative velocity​

Answer 1

Answer:

The relative velocity of an object A with respect to another object B is the velocity that object A would appear to have to an observer situated on object B moving along with it

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Answer 2

Answer:

Relative velocity is defined as the velocity of an object B in the rest frame of another object A.

Example:

We encounter occasions where one or more objects move in a frame which is non-stationary with respect to another observer. For example, a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion.