1. The problem statement, all variables and given/known data A block of mass 7 kg is pushed against a wall by force P. The coefficient of static friction between the block and the wall is 0.42. Determine an expression for the force P as a function of θ such that the block will not slide up the wall or fall down the wall. a.) Draw a free-body diagram for this problem b.) Determine the force value needed if θ = 13° c.) What is the minimum force required such that the block will remain stationary, and at what angle should this minimum force be applied? 2. Relevant equations mg - f = Psinθ n = Pcosθ f = μscosθ 3. The attempt at a solution I honestly wasn't sure where to start out since we haven't done any vertical force problems in class (I'm in a summer mini term, so my teacher tends to just rush through everything). So far, this is what I have, but I know that I am probably completely off. After doing my FBD, I decided that I could do part C to find the minimum force needed, but I just kept the angle at 13°, so I'm not sure I did that correctly, either. mg - μscosθ = Psinθ P(sinθ + μscosθ) = mg P = mg / sinθ + μscosθ P = 7(9.81) / sin13° + (.42)(cos13°) P = 108.28 N Thank you so much for helping! All of us in the class are just drowning right now.