| A | B |
|---|
| Inertia | The tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force |
| Force | A push or pull exerted on an object in order to change the motion of the object; force has size and direction |
| Push | to press against with force |
| Pull | to draw or tug at with force. |
| Newton | The SI unit of force |
| Speed | the distance traveled divided by the time during the motion occured |
| Direction | the line along which anything lies, faces, moves, etc., to the reference point |
| Velocity | The speed and direction of motion of a moving body. |
| motion | an objects change in position reletaive to a reference point |
| Acceleration | a rate of increase of velocity |
| Friction | The resistance encountered when one body is moved in contact with another |
| air resistance | The force that opposes the motion of objects through air |
| gravity | A force of attraction between objects that is due to their masses |
