3/319 The block of weight W is given an initial velocity U1 20 ft/sec up the 20° incline at point A. Calcu- late the velocity v₂ with which the block passes A as it slides back down. = 02 V1 = 20 ft/sec 20° W Mk = 0.20 A Problem 3/319

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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.