A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 68.0 kg, and the height of the water slide is 11.8 m. If the kinetic frictional force does -5.72 × 103 J of work, how fast is the student going at the bottom of the slide?

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Asked Jun 15, 2019
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A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 68.0 kg, and the height of the water slide is 11.8 m. If the kinetic frictional force does -5.72 × 103 J of work, how fast is the student going at the bottom of the slide?

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Expert Answer

Step 1

Using the law of conservation of energy,

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KE = PE+Wc tion 1 mvmgh+Wfriction 2 W gh+friction v= m Lo

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Step 2

Substituting the...

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(9.8m/s (11.8m)+-5.72x10 68.0kg =7.94m/s

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