19-10. The 30-kg gear A has a radius of gyration about its nter of mass O of ko = 125 mm. If the 20-kg gear rack B is subjected to a force of P required for the gear to obtain an angular velocity of 20 rad /s, starting from rest. The contact surface between the gear rack and the horizontal plane is smooth. P = 200 N, determine the time 0.15 m A P = 200 N B

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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.