AP Physics C - Momentum
"Momentum" is a quantity that Newton originally referred to as a "quantity of motion"--a measure of an object's mass and velocity. In fact, Newton's Second Law wasn't stated in terms of a force's effect on accelerating a mass, but rather a force's effect on an object's momentum.
Conservation of Momentum Video Lessons
Conservation of Momentum (Mechanical Universe, Episode 15)Multiple-Choice Practice Problems
Scroll down to see multiple choice practice problems in Impulse, Momentum, Conservation of Momentum, and Center of Mass.