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Olympic skier lindsey vonn skis down a steep slope that descends at an angle of 30∘ below the horizontal. the coefficient of sliding friction between her skis and the snow is 0.10.

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Below is the solution:

acceleration a = g(sinΘ - µcosΘ) = 9.8m/s² * (sin30º - 0.1*cos30º) = 4 m/s² 
velocity v = a*t = 4m/s² * 6.4s = 26 m/s 

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