The velocity of A is 1.7 m/s downward, the velocity of B is 3.4 m/s upward, and the velocity of D is 1.9 m/s downward. Find the velocity of C. The velocity of C is positive if downward, negative if upward. Answer: vC = _____m/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.