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Science Unit 15-1
| Term | Definition |
|---|---|
| a push or pull, which may cause a change in an object's motion | force |
| a force that acts between two touching objects and that opposes motion | friction |
| forces that cancel each other out because they are equal in size and opposite in direction | balanced forces |
| forces that cause a change in an object's motion because they don't cancel each other out | unbalanced forces |
| the force of attraction between objects, such as the attraction between Earth and objects on it | gravity |
| measure of the force that gravity exerts on an object | weight |
| the speed of something in a given direction | velocity |
| exert force in order to move someone or something away from oneself or the origin of the force | push |
| exert force, typically by taking hold of someone or something, in order to try to move them toward oneself or the origin of the force | pull |
| a vehicle's capacity to gain speed within a short time | acceleration |
| the amount of matter in something | mass |
| a tool that is used to measure the size of a force | spring scale |