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Kevin Hart (64 Kg) is tobogganing down a hill on a toboggan that has a mass of 9 kg. Part way down, when he is still 31 m (measured vertically) above the bottom of the hill, Dwayne Johnston passes Kevin Hart. Kevin Hart is moving a velocity of 9 m/s. (QJRJZAAYRG)
a) What is the total energy of Kevin Hart and the toboggan?
b) What will Kevin Hart's velocity at the bottom of the hill be?
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