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A 90 kg skier starts from the top of a hill with a 19 deg slope....

A 90 kg skier starts from the top of a hill with a 19 deg slope. The skier reaches the bottom of the slope 11 s later.

a) If there is a constant friction force of 70 N which resists his motion, how long must be the incline of the hill?

b) Draw a force diagram for the skier with labels and magnitudes.

c) What is the coefficient of kinetic friction between the block and ramp?

d) How much work is done by the normal force?

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