Question

A skier wants to reach a speed of 14 m/s at the bottom of a slope...

A skier wants to reach a speed of 14 m/s at the bottom of a slope of length L inclined at an angle of 30° with respect to the horizontal. If the skier starts from rest, what is the minimum L required to reach this velocity?

28 m

20 m

14 m

10 m

5 m

0 0
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Answer #1

Using conservation of enrgy

mg L / sin 30 = 0.5 m v^2

9.8 x L/0.5 = 0.5 x 14^2

Distance, L = 5 m

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