# Momentum

Momentum-The prooduct of an object's mass and velocity.(Momentum = Mass x Velocity)

Conservation of momentum-A conservation law stating that the total linear momentum of a closed system remains constant through time, regardless of other possible changes within the system

No one is quite sure why "p" is used for momentum. It likely came from the Latin word "petere" which means "go towards". They couldn't use "m" because that was already used for mass.

how can a heavy moving van have the same momentum as a small motorcycle? It's because the motorcycle is going fast and the van is going slow.

For example, if the van weighs ten times as much as the motorcycle, and is driving 5 mph it would have the same momentum as the motorcycle driving 50 mph.

elastic collision- no kinetic energy is lost.(sticky collision)

inelastic collision- some of the energy will be lost to heat or sound or light or some other energy.(non-sticky collision)

What type of collision would you think throwing a piece of clay onto the ground would be?

Inelastic collision. Because when the clay slams into the ground, some of the kinetic energy of the clay was lost as heat and sound to the ground and air, and some of the heat remains in the clay. Since the velocity became zero, so did the momentum. The energy is still around, but divided up in different places.

angular momentum- when the object spins around and around like a top instead of going straight like the baseball or the car.

In space,nebulae, stars, black holes, and planets all have angular momentum, and they all spin around.

#Momentum

#Kettner

elastic collision
inelastic collision