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Chapter 5 Science vo
Term | Definition |
---|---|
Motion | An object’s change in position relative to a reference point. |
Speed | The distance traveled divided by 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 tine; an object accelerates if its speed,direction,or both change. |
Force | A push or pull exerted on an object in order to change the motion of the object; force has size and direction. |
Newton | The SI unit for force (symbol, N) |
Net force | The combination of all of the forces acting on an object. |
Friction | a force that opposes motion between two surfaces that are in contact. |
Gravity | A force of attraction between objects that is due to their masses. |
Mass | a measure of the amount of matter in an object. |