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S8P5.a
recognize that every object exerts gravity force on every other object
| Term | Definition |
|---|---|
| law of universal gravitation | stares that the force of gravity acts between all object in the universe |
| mass | a measure of the amount of matter in an object |
| newton's first law of motion | states that an object at rest will stay at rest and an object in motion will stay in motion unless an unbalanced force acts on the object |