Physics prob 2 ... Help needed!!! 1. The problem statement, all variables and given/known data Like i sayed in my other posts this is probably easy but my teacher doesn't teach us anything so i don't have a clue how to do this. Can someone please explain how to do it? A window washer pushes a sponge up a vertical window at a constant speed by applying a force. The sponge has a mass of .800 kg, and the coefficient of kinetic friction between the sponge and window is u_k=0.253. Determine the magnitude of the applied force, and the magnitude of the normal force exerted by the window on the sponge. *There is a 20 degree angle( i put the pic below) 2. Relevant equations F(y) = weight of sponge + Frictional force F(f) = u*F(x) 3. The attempt at a solution ok so what i did was that i took the sin 70 which if i'm not mistaken should equal F(x). sin 70=F(x) .94=F(x) Then I put this in the equation for frictional force. F(f)=uF(x) F(f)=(.253)(.94) F(f)=.238 After that I put it in to the equation for F(y). F(y)=weight of sponge + F(f) F(y)=(.8)+(.238) F(y)=1.048 My plan is to do the pythagorian therum to find the applied force, but I want to make sure i am doing it right so far.