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A girl of mass 65 2 kg is travelling at a speed of 18 2...

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A girl of mass 65 2 kg is travelling at a speed of 18 2 m s at the top of a 21 5 m high roller coaster loop a Determine the girls kinetic energy at t he top of the loop b Assuming negligible losses of energ y due to friction and air resistance dete rmine the girls total mechanical energy at the bottom of loop h 0 m

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