# Momentum

by:Karen Weaver

**Momentum**- a characteristic of a moving object that is related to the mass and the velocity of an object

**Conservation of momentum**- in the absence of outside forces like friction, the total momentum of objects that interact does not change

# Momentum formula

**Momentum = Mass x Velocity**

# What is "P" in terms of momentum?

In terms of momentum, "P" is used as a substitute for "petere" which is Latin for momentum. It is also used as the product of the equation for momentum.

It is possible for a small motorcycle and a heavy moving van to have the same momentum if the small motorcycle has a high enough velocity to have an equal product to the heavy moving van when multiplied by its mass.

# Sticky and Non-Sticky

A sticky collision is when something has the same mass and gets tangled together when collided. After the objects collide they have the same momentum. A non-sticky collision is when two objects of the same mass don't stick together and outside forces are negligible, the objects trade velocities.

In an elastic collision two objects in which the total kinetic energy of the two bodies after the encounter is equal to their total kinetic energy before the encounter. An inelastic** **collision, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved.

# Example:

If you throw a piece of clay on the ground it would be an inelastic collision because none of the kinetic energy would be conserved.

# Angular Momentum

In physics, angular momentum, moment of momentum, or rotational momentum is a measure of the amount of rotation an object has, taking into account its mass, shape and speed. The orbital angular momentum for an atomic electron can be visualized in terms of a vector model where the angular momentum vector is seen as processing about a direction in space. While the angular momentum vector has the magnitude shown, only a maximum of *l* units can be measured along a given direction, where *l* is the orbital quantum number.