* Any impluse acting on a system changes the system's momentum.
Here Fave is the average external force acting on the system. When this external force is zero, then momentum is conserved in that Dp = 0 and pf = po along each coordinate axis.
* This relationship also applies to any component of a system as well as to the overall system. Then Fave is an internal force that act between components.
* For any individual body we can also write the inpulse-momentum theorem as,
where Fave is the average net force acting on the body. More generally,
* Stated in words. The final momentum of any object (or collection of objects) must equal to its initial momentum plus any impulse imparted to the object (or collection of objects).
Connection to Newton's Second Law:
