1. The problem statement, all variables and given/known data A horizontal force F is applied to hold a block, mass m = 1.7 kg against a vertical wall. The coefficients of kinetic and static friction between the block and wall are 0.81 and 0.87 respectively. F is gradually reduced until the block falls. Just before it falls, what is the magnitude of the total contact force Fc exerted by the block on the wall, and what is the angle θ it makes with horizontal? (+ve for above, -ve for below the horizontal). 2. Relevant equations μsN=Ff F=mg 3. The attempt at a solution So, if weight surpasses friction, it slips. μsN<W N<W/μs N=1.7*9.8/0.87=19N approximately I have no clue what it is referring to when it asks me to find the angle. The contact force seems to be horizontal so angle is 0?