A robot arm moves so that Ptravels in a circle about Point B, which is not moving. Pstarts from rest, and its speed increases at a constant rate of 11 mm/s2. Determine (a) the magnitude of the acceleration when t= 4 s, (b) the time for the magnitude of the acceleration to be 80 mm/s2. P 0.8 m B The magnitude of the acceleration i The time required is ] mm/s2. |S.

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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.