The distance y = 2.5 m. Find the upward velocity of A if the downward velocity of B is 3.3 m/s. Neglect the diameters of the pulleys. The motions of A and B are constrained because they are connected by a rope of constant length. The length of the rope depends on the distances sA and y which change. Write an expression for the length L of the rope in terms of the variable distances sA and y and the fixed distance 13 m. If the distance sA = 2.5 m and y = 2.5 m, how long is the rope that connects moving point A to fixed point C?

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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.