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9 Cards in this Set
- Front
- Back
work |
the transfer of energy to an object by using a force that causes the object to move in the direction of the force |
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joule |
the unit used to express energy |
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power |
the rate at which work is done or energy is transformed |
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watt |
the unit used to express power |
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machine |
a device that helps do work by either overcoming a force or changing the direction of the applied force |
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work input |
the work done on a machine |
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work output |
the work done by a machine |
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mechanical advantage |
a number that tells how many times a machine multiplies force |
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mechanical efficiency |
a quantity,usually express as a percentage,that measures the ratio of work output or work input |
