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Chapter twelve

Vocabulary

QuestionAnswer
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
Created by: kimberlyatchley
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