Ch. 3 Speed & Acceleration
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Created by:
roberthanson on February 24, 2011
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16 terms
Terms | Definitions |
|---|---|
 Distance | How far an object has moved. |
| Displacement | The distance and direction of an object's change in position from the starting point. |
| Speed | The distance an object travels per unit of time. |
| Average Speed | The total distance divided by the total time of travel. |
| Velocity | The speed of an object in a particular direction. |
| Acceleration | The rate of change of velocity. |
| Force | A push or pull. |
| Newtons | The unit that force is measured in. |
| Net Force | When two or more forces act on an object at the same time, the forces combine to form this. |
| Balanced Forces | Forces on an object that are equal in size and opposite in direction. |
| Unbalanced Forces | When forces combine to produce a net force that is not zero, the forces acting on the object are this. |
| Inertia | The tendency of an object to resist any change in its motion. |
| Friction | The force that opposes motion between two surfaces that are touching. |
| Static Friction | The frictional force that prevents two surfaces in contact from sliding past each other. |
| Sliding Friction | The force that acts in the opposite direction to the motion of a surface sliding on another surface. |
| Air Resistance | Opposes the motion of objects that move through the air. |
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