2/162 A fireworks shell P fired in a vertical trajectory has a y-acceleration given by a, = -g – ku², where the latter term is due to aerodynamic drag. If the speed of the shell is 15 m/s at the instant shown, deter- mine the corresponding values of r, r, ï, 0, 0, and ö. The drag parameter k has a constant value of 0.01 m-1 100 m 200 m

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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.