Work, energy and power

Publisher Summary

This chapter discusses the concept of work, energy, and power. If a body moves as a result of a force being applied to it, the force is said to do work on the body. The amount of work done is the product of the applied force and the distance. The unit of work is the joule, J, which is defined as the amount of work done when a force of one Newton acts for a distance of one meter in the direction of the force. Energy is the capacity, or ability, to do work. Energy is also measured in joule and it expended when work is done. There are several forms of energy, such as mechanical energy, chemical energy, heat or thermal energy, nuclear energy, electrical energy, light energy, and sound energy. Energy ...

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