Work:
Power:
It is described as rate of work done with respect to time. There are two kinds of power:
(i) Rate of doing work is known power. It is a scalar quantity. If velocity vector creates an angle θ with the force component, then 
(ii) In rotator motion:
Since P=dW/dt
Energy:
Definition: Energy is described as internal capacity of doing work. When we call that a body has energy we mean that it can do work.
Energy seems in many forms such as electrical, mechanical, chemical, optical, thermal, Acoustical (sound), nuclear, atomic, molecular, etc. and can converts from one form to the other.
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