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Ch.5
Ch.5 vocbulary
Term | Definition |
---|---|
Motion | an object's change in position relative to a reference point. |
Speed | the distance travel by the time interval during which the motion occurred |
Velocity | the speed of an object in a particular direction |
Acceleration | the rate at which velocity changes over time;an object accelerates if its speed,direction,or both change |
Force | a push or pull of motion |
Newton | the unit for force |
Net force | the combination of all of the forces acting on a object |
Friction | a force that opposes motion between two surfaces |
Gravity | a force that attracts objects to its surface |
Weight | a measure of gravity on a object |
Mass | the amount of matter in a object |