It is known that the static frictional force between block B and the plate will be overcome and the block will slide when its acceleration reaches 3 m / s2 (Figure 7b_4). If the plate starts from rest at t = 0 s and accelerates uniformly at a rate of 4 rad / s2 , determine the time t and the angular speed of the plate when the block starts to slip (r = 200 mm).

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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.