Hi, 1. The problem statement, all variables and given/known data I would like to determine the position, magnitude and direction of the minimum force F required to turn over the box shown in the attachment (width - B, height - H). The (uniform) box is placed on a horizontal plane. The coefficient of friction between the box and the plane is μ. 2. Relevant equations 3. The attempt at a solution Since τ=r x F, I believe the minimum force would have to be at either D or C (so that r is maximum). I picked C and placed my Fx and Fy there, where Fx=Fcosθ and Fy=Fsinθ and θ is the angle between F and the positive x axis. I was then trying to write the equations for the torques wrt to A. I figured that when the box is turned over, N equals zero and therefore there is no friction. I was then left with two effective forces, namely: F and mg. The equation I wrote down was: BFsinθ - FHcosθ-mgB/2=0 Is that correct?