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There are different methods of measuring work.

Work is defined as a change in state of energy from one form to another. Mechanical energy can be measured in horsepower, foot-pounds or their metric equivalent. This is measured with a dynamometer. Electrical energy is measured in watts, this is measured with a watt-ohm meter, or a volt-ammeter. Heat energy is measured with a thermometer, and potential energy can be measured with a calorimeter. For other types of energy there are different tools used to measure it.

In order to determine work performed, the energy before the work is done must be measured, then the energy after the work is done is measured, then the work done can be calculated from the results.

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