State the unit of energy and define it?
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The S.I. unit of energy is joule(J).A body is said to possess an energy of one joule if one joule work is done to bring the body in that state i.e. a force of 1 newton moves the body by a distance of 1 metre in the direction of force.
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According to law of conservation of energy, energy changes from one form to another form, but the total energy of that system
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