| A | B |
|---|
| force | A push or a pull or any action that is able to change motion. |
| Newton's first law | An object at rest will stat at rest and an object in motion will stay in motion with the same velocity unless acted on by an unbalance force |
| inertia | The property of an object that resists changes in motion |
| unbalanced forces | The result in a net force on an object that can cause changes in motion. |
| Newtons third law | Every action force creates a reaction force that is equal in strength and opposite in direction |
| net force | The sum of two or more forces |
| acceleration | The rate of change of velocity |
| units of acceleration | meters per second per second |
| Newtons second law | a= F/M |
| free fall | The motion of an object acted on only by the force of gravity. |
| acceleration due to gravity | 9.8 m/s/s |
| Universal law of gravitation | The force of gravity between objects depends on their masses and the distance between them |
| orbit | The motion of one object around another caused by gravitational force |
