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5th: Forces/Motion
5th grade vocabulary for forces and motion.
| Question | Answer |
|---|---|
| acceleration | change in velocity with respect to time |
| action | The force one object applies to another. Newton's 3rd Law: For every action, there is an equal but opposite reaction. |
| balanced forces | When two forces cancel each other out. |
| force | A push or a pull. |
| friction | A force that opposes the motion of one object moving past another. |
| gravity | The force of attraction between any two objects due to their mass. |
| inclined plane | A slanted surface used to move objects higher or lower. |
| inertia | The tendency of a moving object to keep moving in a straight line or of any object to resist a change in motion. |
| lever | A simple machine made of a rigid bar and a fixed pivot point, called the fulcrum. |
| mass | A measure of the amount of matter in an object. |
| pulley | A wheel and rope that changes the direction of force. |
| reaction | The force with which an object responds to an action, as in Newton’s third law of motion. |
| simple machine | A machine with few moving parts, making it easier to do work. |
| speed | How fast an object’s position changes with time at any given moment. |
| unbalanced forces | Forces that do not cancel each other out when acting together on a single object. |
| velocity | The speed and direction of a moving object. |
| weight | The force of gravity between Earth and an object. |
| wheel and axle | A wheel with a rod through the middle. |
Created by:
jmitchell84
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