By: Abby S.

1.) Momentum: a characteristic of a moving object that is related to the mass and velocity of the object

2.) Conservation of Momentum: The law of conservation of momentum states that, in the absence of outside forces like friction, the total momentum of objects that interact does not change.

3.) Formula for Momentum: Momentum = Mass x Velocity

4.) "p" in the Formula: 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.

5.)A heavy moving van can have the same momentum as a motorcycle because although the van may have a greater mass than the motorcycle, if the motorcycle travels at a greater speed the motorcycle is able to have the same momentum.
Example: Mass- object 1: 20 grams
                               object 2: 10 grams
                  Velocity- object 1: 2 mph
                                     object 2: 4 mph
object 1's momentum: 20 x 2 = 40 g x m/s
object 2's momentum: 10 x 4 = 40 g x m/s

6.)Sticky collisions: The difference between a sticky collision and a non-sticky collision is that during a sticky collision objects end up sticking together after colliding. After the objects collide during a sticky collision, the cars keep the same momentum. While during a non-sticky collision, two objects of the same mass don't stick together after a collision and the objects just trade velocities. The object that is going faster before the collision will end up slowing down, and the object that is going slower before the collsion will end up speeding up.

7.) Elastic Collsion

8.) Inelastic Collision

9.) I think that throwing a piece of clay onto the ground would be an inelastic collision because the energy would not be conserved. When you throw clay onto the ground it does not bounce back up such as a bouncy ball, it rather loses its energy.

10.) Angular Momentum: This is when an object spins around and around like a top instead of going straight like a baseball or the car. In space, nebulae, stars, black holes, and planets all have angular momentum, and they all spin around. Angular momentum explains why an ice skater spins more rapidly as she pulls her arms in.