Chapter twelve Word Scramble
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| Question | Answer |
| done only when force causes a change in the position or the motion of an object in the dirction of the applied force. | work |
| the rate at which work is done, that is, how much work id done in a given amount of time. | power |
| defined as the ratio between the output force and the input force. | mechanical advantage |
| one of the six basic types of machines, which are the basis for all other forms of machines. | simple machines |
| combines two or more simple machines. | compound machines |
| results from the relative positions of objects in a system. | potential energy |
| the energy that an object has because it is in motion. | kinetic energy |
| the sum of the potential energy and kinetic energy in a system. | mechanical energy |
| defined as the ratio of useful work output to total work input. | efficency |
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