| A | B |
|---|
| Work | When force moves an object |
| Friction | When two objects rub together |
| Force | Effort (push or pull) applied to an object |
| Accelerate | To speed up |
| Compound machine | Combination of two or more simple machines |
| Weight | The measure of the force of gravity on an object |
| Machine | A mechanical divice that makes wor easier |
| Wedge | Shaped like a triangle |
| Lever | A stiff bar use to pry or move something |
