Answer to Question #201968 in Physics for Doms

Question #201968

You serve a volleyball that has a mass of 2.1 kg. With what speed does the ball leave your hand if it has 945 J of kinetic energy?

Expert's answer

"KE=mv^2\/2\\to v=\\sqrt{2\\cdot KE\/m}=\\sqrt{2\\cdot945\/2.1}=30\\ (m\/s)" . Answer

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