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Work, Power, and Mac
Content Creation Project2
Term | Definition |
---|---|
Joule | The unit used to express energy (symbol J) |
Power | The rate at which work is done or energy is transformed |
Watt | The unit used to express power (symbol W) |
Work | The transfer of energy to an object by using a force that causes the object to move in the direction of the force |
Machine | A device that helps do work by either overcoming a force or changing the direction of the applied force |
Work input | The work done on a machine; the product of the input force and the distance through which the force is exerted |
Work output | The work done by a machine; the product of the output force and the distance through which the force is exerted |
Mechanical advantage | A number that tells how many times a machine multiplies force |
Mechanical efficiency | A quantity, usually expressed as a percentage, that measures the ratio of work output to work input in a machine |