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MCAT Chemical and Physical Foundations of Biological Systems 15
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Avg score: 61% • Most missed: “At what speed is the skier moving when she reaches the peak of the second hill?”

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A woman of mass 55 kg begins motionless atop a hill. She skis all the way down the frictionless hill, which is 90 m high, to height 0 m, and then she ascends another hill that is 75 m high. This skier is in a conservative system, with gravity as the only force acting upon her.


MCAT Chemical and Physical Foundations of Biological Systems 15
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3 Questions

1. At what speed is the skier moving when she reaches the peak of the second hill?
2. How much of the skier's original potential energy is lost during her journey from the peak of the first hill to the peak of the second hill?
3. At which point in her ski route will the skier have the greatest amount of kinetic energy?

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