A hockey puck of mass 162 grams slides toward Brett with a velocity of -15 meters per second. Brett whacks the puck directly away from himself with his stick, applying force as shown on the graph below. His maximum force is 33 newtons, and each tic mark on the time axis represents 1/10th of a second. What is the final velocity of the puck? Include units in your answer. More information.

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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.