Block A (mass 40 kg) and block B (mass 80 kg) are connected by a string of negligible mass as shown in the figure. The pulley is frictionless and has a negligible mass. If the coefficient of kinetic friction between block A and the incline is ?k = 0.21 and the blocks are released from rest, determine the change in the kinetic energy of block A as it moves from C to D, a distance of 23 m up the incline. (View the image for the diagram)

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.