The 80-lb tailgate of a car is supported by the hy nd the aulic lif tailgate falls and hits the car with an angular velocity of 5.3 rad/s. The tailgate can be modeled as a 22-in.-long slender rod. 55 15 D

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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.