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unit 1 motion
| Term | Definition |
|---|---|
| position | the location of an object |
| reference point | a location to which another location is compared |
| motion | an objects change in position relative to a reference point |
| speed | the distance traveled divided by the time during motion occurred |
| vector | a quantity that has both size and direction |
| velocity | the speed of an object in a particular direction |
| acceleration | the rate at which velocity changes over time |
| centripetal acceleration | the acceleration directed toward the center of a circular path |
| force | a push or pull exerted on an object in order to change motion of an object |
| inertia | the tendency of an object to resist a change in motion unless acted upon by an outside force |
| net force | the combination of all of the forces acting on an object |
| gravity | a force of attraction between two objects that is due to their masses |
| free fall | the motion of a body when only the force of gravity is acting on the body |
| orbit | the path that a body follows as it travels around another body in space |
| fluid | a nonsolid state of matter in which the TOMS ARE FREE TO MOVE PAST EACH OTHER |
| pressure | the amount of force exerted per unit area of a surface |
| pascal | the SI unit of pressure |
| atmospheric pressure | the pressure caused by the weight of the atmosphere |
| buoyant force | he upward force that keeps an object immersed in or floating |
| Archimedes principle | the principle;e that states that the buoyant force on an object in a fluid is an upward force equal to the weight of the object |