(a) Define the term'energy' of a body. What is the SI unit of energy?
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Energy can be defined as the ability to do work. The amount of energy possessed by a body is equal to the amount of work it do when its energy is released. Energy is a scalar qauntity. The SI unit of energy is Joule. The energy required to do 1 joule of work is called 1 joule energy.
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Energy is the quantitative property that must be transferred to an object in order to perform work on, or to hear, the object. The SI unit of energy is the joule(J).
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