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9 Cards in this Set
- Front
- Back
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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 to express energy; equivalent to the amount of work done by a force of 1 N acting through a distance of 1 m in the direction of the force |
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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; equivalent to joules per second |
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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; the product of the input force and the distance through which force is exerted |
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work output |
The work done by a machine ; the product of the output force and the distance through which the force is exerted |
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mechanical advantage |
a number that tells how many times a machine multiplies force |
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mechanical efficiency |
The ratio of output to input of energy or of power; it can be calculated by dividing work output by work input |
