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Force and Motion
Term | Definition |
---|---|
Force | A push or a pull; affects the object's motion; start, stop, speed up or slow down. |
Motion | A change in position of an object caused by force. |
Speed | Rate of motion or progress; determined by time and distance. |
Balanced Forces | When two forces on an object are completely equal; cause no change in motion |
Unbalanced Forces | When one force on an object is stronger than the other; change in motion occurs. |
Friction | A force when two objects rub together; slows motion. |
Air Resistance | Friction in the air |
Gravity | A force that pulls objects to the Earth |
Inertia | Tendency for an object to remain in motion or to remain at rest until a force acts upon it. |
Mass | The amount of matter that makes up an object. |
Direction | Course or path that an object moves (north, south, east, west, left, right, up, down, across). |
Position | An object's location in relation to another object (across, below, beside, behind, ahead of). |
Lubricant | Material used to reduce friction |
Acceleration | An increase in speed |
Torque | A force that causes an object to rotate |