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Physics Unit Review
Vocabulary for Physics Unit Test
| Question | Answer |
|---|---|
| energy transfer | energy transfers from one form to another |
| mechanical energy | potential energy and kinetic energy combined in lifting, stretching, bending |
| radiant energy | energy that can travel through space in waves (such as the sun - radiation) |
| nuclear energy | energy stored in the nucleus of every atom, extremely powerful, and comes from certain elements such as uranium |
| thermal energy | total energy of all particles of an object, depending on the temperature of the object |
| chemical energy | energy released during a chemical reaction |
| sound energy | energy you can hear |
| Law of Conservation of Energy | the idea that energy can change from one form to another, but cannot be created or destroyed |
| Newton's Law #1 | Every object at rest stays at rest; every object in motion stays in motion until another force acts on it. Law of Inertia |
| Newton's Law #2 | Amount of force needed to change the speed of an object depends on the mass of the object. Principle of of Accelerated Motion |
| Newton's Law #3 | To every action there is an opposite and equal reaction. Forces come in pairs called action-reaction pairs. |
| acceleration | change in velocity (direction, speed or both) |
| inertia | an object's resistance to a change in motion |
| speed | distance divided by time it took for motion to occur (distance/time) |
| velocity | speed with direction |
| energy | the ability to do work |
| potential energy | energy that is stored (not moving) |
| kinetic energy | energy in motion |
| balanced forces | combined forces create a net force of zero (object does not move) |
| unbalanced forces | combined forces create a net force greater than zero (object moves) |
| force | push or a pull |
| net force | the sum (+) or difference (-) of all of the forces acting on an object |
| friction | a force that resists the movement of an object |
Created by:
mharlan
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