Sam, whose mass is 75kg, starts down a 50-m-high, 20 degree frictionless slope. A strong headwind exerts a horizontal force of 200N on him as he skies. Use work and energy to find Sam's speed at the bottom. Hi! I'm new to posting on this website but thought I'd give it a go! I would really appreciate help with this problem. I know the answer is supposed to be around 16m/s, but for some reason I am getting an answer that is too high of a velocity. Here is my attempted solution. W = ΔKE+ΔU Given he starts from rest, we know that, W=KEf+Ui Fx=200N W=200N(50/tan(20)) 200N(50/tan(20))=1/2mvf^2 -mghi 1712.6=Vf^2 Vf=√(1712.6) =41m/s However, this solution is not correct. Where did I go wrong?