Question
Asked Dec 25, 2019
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A 75-kg cross-country skier glides over snow as in Figure P11.33. The coefficient of friction between skis and snow is 0.20. Assume all the snow beneath her skis is at 0°C and that all the internal energy generated by friction is added to snow, which sticks to her skis until it melts. How far would she have to ski to melt 1.0 kg of snow?

Figure P11.33
iStockphoto.com/technotr
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Figure P11.33 iStockphoto.com/technotr

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Expert Answer

Step 1

Formula to calculate the work done against the friction is,

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W = ,msier gd ..(1) -(T)

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Step 2

Formula to calculate the heat required to melt the snow is,

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(II) Qmer = m, L, ..(I) meit

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Step 3

The work done against the friction...

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W = Q meit

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Tagged in

Science

Physics

Friction