click below
click below
Normal Size Small Size show me how
ch 5&6 vocab quiz
| Question | Answer |
|---|---|
| motion | an objects change in position relative to a 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 |
| force | a push or a pull exerted on an object in order to change the motion of the object |
| newton | the SI unit for force |
| 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 |
| weight | a measure of the gravitational force exerted on an object |
| mass | a measure of the amount of matter in an object |
| terminal velocity | the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction to the force of gravity |
| free fall | the motion of a body when only the force of gravity is acting on the body |
| projectile motion | the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth |
| inertia | the tendency of an object to resist a change in motion unless an outside force acts on the object |
| momentum | a quantity defined as the product of the mass and velocity of an object |