# Momentum by Ethan Hagmann

Momentum is a characteristic of a moving object that is related to the mass and velocity of an object. The conservation of momentum states that, in the absence of outside forces like friction, the total momentum of objects that interact  does not change. The formula to find the momentum of an object is p=mv (Momentum= Mass x Velocity) which is measured in Kilograms times meters per second (kg*m/s). In the formula p=mv, momentum is represented by p because it represents the momentum of a particle. A heavy moving van can have the same momentum as a small motorcycle if the motorcycle travels at a higher velocity. The difference between a "non-sticky" collision and a "sticky" collision is that a "non-sticky" collision  is when two objects of the same mass don't  stick together and outside forces (such as friction) are negligible, the objects just trade velocities. A "sticky" collision  is when  two objects collide together and become stuck to each other, the objects share the momentum and the total momentum of the two objects stay the same.

Elastic collision is a collision where the energy in an object is conserved and no kinetic energy is lost. "If the kinetic energy didn't change, then neither did the value of the momentum..."(www.physics4kids.com)

Elastic collision

Inelastic collision is an occasion where energy is lost from the object, even though the total energy did not change. An object that has an inelastic collision will have less energy when rebounded and the momentum would decrease. Therefore, the energy of the object was not conserved, but the total energy was conserved.

Inelastic collision

If you were to throw a piece of clay into the ground it would be an inelastic collision because  the clay would have less energy when it rebounded.This means that the energy was not conserved and the momentum was not conserved making it an inelastic collision.

Angular momentum is the measure of the amount of rotation an object has around a certain axis. This involves outer space because  for planets to rotate, they must rotate around an axis and have a constant momentum that cause them to constantly rotate  and even rotate around the sun where the sun is the axis.