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CBSE Class 11-science Answered

A skater starts from rest on a frictionless hill with vertical height of 50 m and an inclination of 30o. Calculate how far the skater can go horizontally after he reaches the bottom of the hill, if the coefficient of the kinetic friction between the skis and snow is 0.21.
Asked by Topperlearning User | 09 Jul, 2014, 11:07: AM
answered-by-expert Expert Answer

From the law of mechanical conservation of energy, we have

Now, the distance covered by the skater is equal to the change its kinetic energy and this is equal to the work done by the frictional force.
Thus,
So, the skater would cover a horizontal distance of 238.36 m after reaching the bottom of the hill.
Answered by | 09 Jul, 2014, 01:07: PM

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