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Matter in Motion
Chapter 5 Vocab
Word | Definition |
---|---|
Motion | An object's change in position relative to reference point. |
Speed | The distance traveled divided 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 extended on an object in order ti change the motion of the object; force has size and direction. |
Newton | The SI unit for force. |
Net Force | The combination of all 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. |
Weight | A measure of the gravitational force exerted on an object; its value can change with the location of the object in the universe. |
Mass | A measure of the amount of matter in an object. |