The system shown in the figure is composed of bar AB which is pin-supported at A and attached to bar BC. The end of bar BC is connected to the slider block C.  At the instant shown, the acceleration of point B is 1.125 m/s2 downward and the angular velocity of bar BC is 0.5625 rad/s counterclockwise. What is the angular speed of bar AB?

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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.