A professional skier\'s initial acceleration on fresh snow is 90% of the acceler

Question

A professional skier's initial acceleration on fresh snow is 90% of the acceleration expected on a frictionless, inclined plane, the loss being due to friction. Due to air resistance, his acceleration slowly decreases as he picks up speed. The speed record on a mountain in Oregon is 180 kilometers per hour at the bottom of a 29.0 degree slope that drops 196m .
Part A
What exit speed could a skier reach in the absence of air resistance? answer in km/hr.
Part B
What percentage of this ideal speed is lost to air resistance?

Explanation / Answer

part A- 212km/hr part B- 15%

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