Ball 1 is launched with an initial vertical velocity v₁ = 161 ft/sec. Ball 2 is launched 3 seconds later with an initial vertical velocity v2. Determine v₂ if the balls are to collide at an altitude of 283 ft. At the instant of collision, is ball 1 ascending or descending? 17, 11 Answer: V₂ = i ft/sec

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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.