Impulse and Momentum
The momentum of an object is the product of its mass and its velocity. Momentum is a vector quantity and is measured in or
The equation for momentum is:
= momentum in
= mass in
= velocity in
A change of momentum is known as an impulse. When a force acts on an object to change its velocity, the momentum of the object will change because the velocity changes. The equations for impulse are:
Another equation for impulse is:
What is the momentum of a 50kg girl walking north at ?
A 900kg car is travelling west at before coming to a complete stop at a red light. What is the impulse of the car as it stops at the red light?
. Note: we will denote west as positive: