At time t = 0 a small ball is projected from point A with a velocity of 191 ft/sec at the angle 55°. Neglect atmospheric resistance and determine the two times t₁ and t₂ when the velocity of the ball makes an angle of 35° with the horizontal x-axis. A 55° u = 191 ft/sec Answers: t₁ = t₂ = sec 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.