The disk shown starts from rest and is given an angular acceleration of a = 2t2, where t is in seconds. At the instant that t = 3 seconds, calculate: a) The angular velocity, w, of the disk b) The angular acceleration, a, of the disk c) The normal acceleration of point P on the disk d) The tangential acceleration of point P on the disk 0.4 m

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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.