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Gayle runs at a speed of 3.30 m/s and dives on a sled, initially at rest...

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Physics

Gayle runs at a speed of 3.30 m/s and dives on a sled, initiallyat rest on the top of a frictionless snow-covered hill. After shehas descended a vertical distance of 5.00 m, her brother, who isinitially at rest, hops on her back and together they continue downthe hill. What is their speed at the bottom of the hill if thetotal vertical drop is 15.0 m? Gayle's mass is 47.0 kg, the sledhas a mass of 5.25 kg and her brother has a mass of 30.0 kg.

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