**Relative velocity is important in physics.**

**Relative velocity definition**. The velocity of a body with respect to another regarded as being at rest — compare relative motion. It is a measure of how fast two objects are moving with respect to each other. V b a → is directed from b to a.

Objects have reference frames that show how they move in relation to another object. This is the velocity of b with respect to ( or relative to) a. The relative velocity of an object a with respect to object b is the rate of change of position of the object a with respect to object b.

Relative velocity is also defined as the vector difference between the velocities. The relative velocity of a plane is defined as “”the velocity of a plane moving in air is measured by an observer in another frame either stationary or moving with same or varying velocity.””. It is measured as the rate of change of position of a body with respect to another body.

If v a and v b be the velocities of objects a and b with. Freebase (0.00 / 0 votes) rate this definition: Velocity webster's revised unabridged dictionary, published.

The velocity of an object measured by a moving observer is referred to as the relative velocity. Relative velocity is the vector difference of the velocities of two objects. Here, the relative velocity is the variance of velocities between you and the tree.

The relative is the velocity of one body with respect to another body. The relative velocity is the velocity of an object or observer b in the rest frame of another object or the observer a. Therefore the velocity of a.