1. The problem statement, all variables and given/known data A 75Kg skier starts down a 50m high 10˚ slope. What is his speed at the bottom? Part A: Consider skis frictionless Part B: Assume that the coefficient of kinetic friction between the skis and the surface of the slope is µk=.05 2. Relevant equations |Ff|=µk•|FN| Fnet=-Ff+FN+Fg=0=ma a=g•sin(ø) (pretend that chi is theta) FN=ma•cos(ø) Values I figured out from Part A: The length of the slope (on the hypotenuse) is 288m Initial velocity in both the X and Y is 0m/s For part A, the final velocity is 31m/s (does not need to be checked) 3. The attempt at a solution Part A: I got part A with 31 m/s and I know it's right. Part B: 0=Fnet=Fg+FN-Ff=ma (Newton's second law) Ff=Fg+FN FN=75Kg•9.81m/s2•cos(10˚)=724.6N I think that I have to plug the normal force into the friction equation (|Ff|=µk•|FN| ) though I'm not sure if I have to and then I don't know what I would do after that.