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| Energy |
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| Any thing that is able to do work possesses energy. Energy is the capacity to do work. Energy is measured by the amount of work that a body can do. Therefore, SI unit of energy is also joule. |
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| There are different forms of energy like for example, mechanical energy, heat energy, electrical energy and chemical energy. In this chapter, we shall study about mechanical energy. |
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| Kinetic energy and potential energy are the two types of mechanical energy. |
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