| A | B |
|---|
| motion | When the distance from another object is changing. |
| reference point | A place or object used for comparison to determine if something is in motion. |
| speed | The distance an object moves in a certain amount of time. |
| speed formula | Distance รท Time |
| constant speed | The speed is the same at all times (the object doesn't speed up or slow down). |
| average speed | The total distance divided by the total time. |
| velocity | The speed and direction of an object. |
| force | A push or a pull on an object. |
| net force | The total force acting on an object. |
| balanced force | When all the forces acting on an object are equal resulting in NO motion. |
| unbalanced force | When the net force changes an object's motion. |
| friction | The force that one substance exerts on the other when they rub against each other. |
| gravitational force | A force of attraction between all matter. |
| magnetic force | Attractions between two different types of metals. There are two poles (north and south). Like poles repel and opposite poles attract. |
| inertia | The tendence of an object to remain at rest or to keep moving in a straight line unless acted upon by a force. |
