| A | B |
|---|
| speed | the distance traveled divided by the time taken to travel the distance |
| instantaneous speed | the speed of an object at one instant of time |
| average speed | is found by dividing the total distance traved by the time taken |
| velocity | the speed of the object and the directions of its motion |
| acceleration | the change in velocity divided by the time it takes for the cange to occur |
| acceleration equation | final speed minus initial speed divided by time |
| mass | the amount of matter in the object |
| kilograms | the unit for mass in SI units |
| inertia | the tendency of an object to resist change in its motion |
| momentum (P) | a measure of how hard it is to stop an object (It depends on the objects mass and velocity) |
| law of conservation of momentum | the total momentum of objects that collide is the same before and after the collision |
