Starting at rest, a hydroplane accelerates at a = 0.8t for the first 10 seconds and then accelerates at a = -1.2t +20 until it comes to a stop. The acceleration is show on the graph below. a (m/s^2) 8 to a) How many seconds does the hydroplane travel before coming to a rest? b) What is the maximum velocity in m S that the hydroplane reached? t (sec) c) How many seconds did it take the hydroplane to reach its maximum velocity? d) How many meters did the hydroplane travel?

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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.