| A | B |
|---|
| Newton's first law of motion | Unless you apply force, things tend to keep on doing what they were doing in the first place. |
| Newton's second law of motion | Force causes an object to accelerate while the object's mass resists acceleration. |
| Newton's third law of motion | For every action, there is a reaction force equal in strength and opposite in direction. |
| Force | A push or pull, or any action that has the ability to change motion. |
| Pounds | Equal to 4.48 newtons. |
| Newtons | Smaller unit than the pound. |
| Inertia | The property of an object to resist changing its state of motion. |
| Mass | Measue of the inertia of an object. |
| Kilograms | Measures mass. One of the primary units of the metric system. |
| Acceleration | Changes in speed or direction. |
| Net Force | The total of all forces. |
| Equilibrium | When forces on an object are balanced, and net force is zero. No change in motion. |
| Gravity | Force that pulls every mass toward every other mass. |
| Weight | The force created by gravity of objects. |
