If block A is intended to move vertically at a constant rate of 4.89m/s, determine the rate (m/s) at which the rope on point B must be pulled downwards. Round off only on the final answer expressed in 3 decimal places. Instead of units, indicate the direction of movement of block A: Use U if upward and D if downward.

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A:

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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.