1. The problem statement, all variables and given/known data The rectangular steel yoke is used to prevent slippage between the two boards under tensile loads P. If the coefficients of static friction between the yoke and the board surfaces and between the boards are all 0.25, determine the maximum value of h for which there is no slipping. For P = 720 N, determine the corresponding normal force N between the two boards if motion impends at all surfaces. I have attached an image of the problem 2. Relevant equations ƩFx=0 ƩFy=0 3. The attempt at a solution I'm honestly not sure where to start. I tried drawing a free body diagram of the two blocks of wood with the P forces and the friction forces as well as the normal force. But other than that I'm not sure how to interpret the yoke and how it's height factors in. Help would be greatly appreciated.