The circular disk of radius r = 0.25 m rotates about a fixed axis through point O with the angular properties w = 2.9 rad/s and a = 3.0 rad/s² with directions as shown in the figure. Determine the instantaneous values of the velocity and acceleration of point A. L Answers: VA = aA = (i (i A α 0.23r ! i + i i + i ! j) m/s j) m/s²

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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.