Corner point A of the uniform square plate, with a mass of 25 kg and a side length of  = 0.21 m, is pinned freely to the collar, which has an acceleration of a = 4.9  (towards the right) along the fixed horizontal shaft. If the plate has an angular velocity of  w = 1.6 rad/s (clockwise) when it swings past the vertical position shown (with G directly below A), what is the magnitude of the angular acceleration  (in ) of the plate at this time instant? The xy-plane is vertical. Choose the correct answer. 24.7 23.5 19.8 28.5 21.0

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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.