The load L is lowered by the two pulleys which are fastened together and rotate as a single unit. For the instant represented, drum A has a counterclockwise angular velocity of 4 rad/sec which is decreasing by 4 rad/sec each second. Simultaneously, drum B has a clockwise angular velocity of 6 rad/sec, which is increasing by 2 rad/sec each second. Calculate the accelerations of points C and D and of the load L. 6" 6"- y В А L--x D 10" | 20" C

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.