3. An 80 kg skier is skiing down a slope (assume its frictionless) as shown in the diagram. The skier then hits a patch of sandy snow that applies a constant frictional force of 320 N directed up the slope.
a. What is the skiers acceleration before hitting the sandy snow?
b. Determine the skiers acceleration once they are on the sandy snow.
c. Assuming the skier started from rest 10 meters before the sandy patch, how far would the skier have to travel on the sandy snow to come to a rest?
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