an object that has energy can do work.; it is the rate at which work is done.; the unit for work is; the energy of atoms and molecules in an object due to their motions is; the total energy is the sum of kinetic and potential; what type of energy increases when you compress a string?; a force acting in the direction an object is moving does positive work.; energy that is the total of the kinetic energy and potential energy in an object or group of objects

An object that has energy can do work; it is the rate at which work is done. The SI unit of work is the joule (J). Temperature or thermal energy is a measure of the average kinetic energy of the atoms or molecules of a substance.

Mechanical energy is the sum of kinetic and potential energy. When a spring is compressed or stretched, the potential energy of the spring increases in both cases. The work done is positive if the direction of force and displacement are the same. The sum of the kinetic energy and potential energy of an object is called mechanical energy. The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy.

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