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Describe the energy of a body? 1.  Energy of a body  is defined as its capacity for doing  work . Because the energy of a body represents the total amount of work done, hence a) It is a scalar quantity just like work. b) Its dimension s are the same as that of work i.e., [ML 2 T -2 ]. c) It is measured in the same  unit  as the work i.e. Jule and erg. 2. It should note here that Energy of a body and power are different from each other. Energy of a body implies the total amount of work that the body can do and it has nothing to do with the time taken to perform the work. On the other hand, the power of the body depends on the time in which the work is done. 3. Energy can exist in different forms such as mechanical energy,  heat  energy, sound energy, electrical energy, light energy etc. Energy of a body Different forms of energy of a body a)  Mechanical energy : The sum of the  potential  and  kinetic en...