A pulley and two loads are connected by inextensible cords as shown in Figure 1. Load A has constant acceleration of 2.5m/s2 and an inital velocity of 2 m/s2, both directed upwards. Determine: a) the number of revolutions executed by the pulley in 3s. b) the velocity of load B after 3s.

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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.