| A | B |
|---|
| Static friction | friction of no movement |
| Rolling friction | friction using wheels, tires or roller skates |
| Sliding friction | friction is when two surfaces are pushed together |
| Newton's 1st Law | objects remain at rest until acted upon |
| Newton's 2nd Law | object will accelerate in the direction of the force applied |
| Newton's 3rd Law | states equal and opposite reactions |
| Force | a push or pull on an object |
| Inertia | tendency of an object to resist change in motion |
| Momentum | a measure of how difficult it is to stop a moving object |
| Friction | rubbing force that acts against the motion between two surfaces |
| gravity | the force of attraction between any two objects in the universe |
| terminal velocity | the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity |
