1. The problem statement, all variables and given/known data Component A is pushed vertically down with a known force F into component B. The angled surface of B is parallel to the angled surface of A. The contact between A and B is rough and so is the contact between B and the ground. The coefficients of friction are known and so is the weight of component B. Determine the angle at which component B is about to slide. 2. Relevant equations See attached image. 3. The attempt at a solution I've drawn the problem in frame 1. In frame 2 I've drawn a free body diagram of component B. In frame 3 I've resolved these forces into X and Y directions. I assume I then write equations for these two directions and determine the angle which makes the net force in the X direction equal zero. Could someone please advise if I've identified the forces correctly and if this approach is correct, thanks!