1.1 Momentum and impulse



Momentum = mass x velocity

Symbol is p. Unit is kgms-1.

It is a vector quantity, the direction is that of the object's velocity.

1 of 4

Newton's laws of motion

Newton's 1st law of motion = an object's momentum will remain the same, unless acted on by a resultant force.

Newton's 2nd law of motion = the rate of change of momentum is proportional to the resultant force on it.

The force is proportional to the rate of change in momentum i.e Newton's 2nd law, therefore:


2 of 4


The impulse is the force x time for which the force acts.


Units are Ns.

3 of 4

Force- time graphs

The area under the line of a force-time graph = impulse of the force.

This is because it is the force x time.

4 of 4


No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Momentum and Impulse resources »