What is a Joule? An Explanation

This video goes over an explanation of the metric unit for work and energy which is the joule. The joule is the derived unit in the metric system for work and energy. Work is done on an object when a force is applied to an object through a distance.

One joule of work is done on an object when a force of one newton is applied over a distance of one meter. The joule is named after James Prescott Joule who lived from 1818 until 1889. He worked on a principle know as the mechanical equivalent of heat which states that whenever a mechanical force is expended, an exact equivalent of heat is always obtained.

Subsequent videos will cover the newton and the watt.. The newton is the derived unit in the metric system for force. A force is a push or a pull. One newton is equal to the force that would give a one kilogram mass an acceleration of one meter per second squared. The watt is the metric unit for power. Power describes how fast work is done. One watt of power is exerted when one joule of work is done in one second.

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