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forces and motion
| Term | Definition |
|---|---|
| gravity | the force that attracts an an object toward the center of the earth, or toward any other physical body having mass |
| mass | the measurement of the amount of the pull of gravity on an object |
| weight | the measurement of the pull of gravity on an object |
| force | push or pull on an object |
| push | to use force to move someone or something away from you |
| pull | to hold onto and move someone or something toward yourself |
| friction | force that opposes movement between touching surfaces and always acts against he force of motion |
| inertia | matters resistance to change in motion |
| speed | the rate at which someone or something moves or travels. |
| position | the place where someone or something is in relation to other people and other things. |