# Momentum.

Momentum:  The strength or force of something moving, measured as the product of an object's mass and velocity.

Conservation of Momentum: The momentum of a system remains constant through time regardless of other possible changes.

Momentum = (mass)(velocity)     p=mv

The letter P represents momentum because it came from the latin word "petere" which means "to go forward".

A heavy moving van can have the same momentum as a small motorcycle because the motorcycle could be traveling at a faster speed than the van.

A sticky collision is when two objects with the same mass collide and stick together. A nonsticky collision is when two objects with the same mass collide but don't stick together.

Elastic Collision: An encounter between two bodies in which the total kinetic energey of the two bodies  after the encounter is equal to their total kinetic energy before the encounter.

Inelastic Collision: A collision in which the kinetic energy is not conserved.

The type of collison if you throw a peice of clay at the ground would be inelastic collision because when the clay hits the ground it stops, so its energy was not lost.

Angular momentum: Is the measure of the amount of rotation an object has.