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Gayle runs at a speed of 3.95 m/s and dives on a sled, initially at rest...

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Physics

Gayle runs at a speed of 3.95 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 45.0 kg, the sledhas a mass of 5.40 kg and her brother has a mass of 30.0 kg.

_________. m/s

Answer & Explanation Solved by verified expert
3.6 Ratings (355 Votes)
as there is no friction hence there is no work done by non conservative force hence we can say that energy is conserved initial potential energy initial Kinetic    See Answer
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