a.An atwoods machine consists of two blocks, A (m=1.3 kg) and B (m=8.7kg). Block B is released from rest at a height of 1.3 meters above the floor, while Block A began on the floor. What is the total energy of the system just before being released.    b. Assuming there is negligible friction, how fast is Block B moving just before hitting the ground c. Now lets assume there is friction. Suppose block B actually reaches the floor with a speed of 0.23 m/sec. How much energy was dissipated by friction

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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.