| A | B |
|---|
| constant motion | steady motion |
| variable motion | motions that moves in many directions and speeds |
| periodic motion | motion that swings back and forth |
| circular motion | motion that moves in a circle |
| vibrational motion | alternating motion |
| speed | how far an object moves during a certain amount of time |
| velocity | the speed and direction of an objects movement |
| force | a push or pull that acts on an object |
| balanced force | when the forces acting on an object are equal |
| unbalanced force | when the forces acting on an object are unequal |
| gravity | a force acting on all objects that pulls them towards the center of the Earth |
| friction | a force that results when two materials rub against one another |
| mementum | the measure of how hard it is to stop or slow an object down |
| work | when a force moves an object |
| power | rate at which work is done |
