| A | B |
| Mass | If _______ increases, force to change motion increases. |
| Force | Push or pull on an object |
| Friction | 2 objects rub together, slowing motion |
| Unit of Force named after scientist who theorized motion | Newton |
| Unbalanced | Force that changes motion |
| Newton's First Law | Law of Inertia |
| Newton's Second Law | F = MA |
| Seat belts | Stop forward motion |
| Inertia | Tendency for objects to resist a change in motion / rest. |
| Accelerate | Speed up |
| Earth revolves around the sun | because of inertia |
| Net Force | found by subtracting opposite forces |