Section 4.2: Power and Efficiency Problem 6. True or False: Power is the rate at which work is done. In particular,the power exerted by the rate of work on a

system by external force is defined as P =Fert · 0, where ū is the derivative of the displacement 5 with respect to time. Thisformula can be derived by taking the derivative with respect to time of the expressionPf=| Feet · dr, where P; and Pf are the initial and final positions of the particlethat the force is acting on.