**kilogram metre per second**

##### SI coherent derived unit

Name | Symbol | Derived quantity | ||

kilogram metre per second | kg m s^{−1} |
momentum | ||

## DefinitionThe kilogram metre per second, symbol kg m s |

The kilogram metre per second, is equivalent to the unit newton second, symbol N s.

### Momentum

In Newtonian mechanics, momentum, or linear momentum, is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space.

If *m* is an object’s mass and *v* is its velocity (a vector), then the momentum *p* is:

Newton’s second law of motion states that a body’s rate of change in momentum is equal to the net force acting on it.