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### Momentum

In classical mechanics, the **momentum** *p* (latin:** pellere**) is the product of the mass and velocity of an object.

##### Explanation

The momentum is a measure of how hard it is to stop a moving object. It is a three-dimensional vector quantity, possessing a magnitude and a direction. If *m* is an object's mass and *v* is the velocity (also a vector), then the momentum is

p=m v

where

mMass vVelocity

## HistoryThe first correct description of momentum was by English mathematician John Wallis in his 1670 book |