Conservation of Momentum
Explains the concepts of Impulse, Momentum, Collisions.
Linear Momentum/Conservation of Momentum/Collisions/Energy
The definition of linear momentum is:
Since mass is an intrinsically positive quantity, p and v always point in the same direction (in the direction of motion). The S.I. unit of momentum is a kg Newton's second law may be expressed (and was originally expressed) in terms of the time rate change of momentum or: