The angular velocity of the disk is defined by ω = (5t2 +2)  rad/s  where t is in seconds. Determine the magnitudes of the angular acceleration at a point 1 cm from the center of the disk when t = 0.5 s.   a. 7 rad/s2  b. 3.25 rad/s2   c. 0.21 rad/s2   d. 5 rad/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.