1. The problem statement, all variables and given/known data A uniform sphere of weight mg and radius r0 is tethered to a wall by a rope of length ℓ. The rope is tied to the wall a distance h above the contact point of the sphere, as shown in the figure.(Figure 1) The rope makes an angle θ with respect to the wall and is not in line with the ball's center. The coefficient of static friction between the wall and sphere is μ. To find: a) Frictional force in terms of r0, m, h, theta b) Suppose the sphere is on the verge of slipping. Derive an expression for coefficient of friction in terms of h and theta. 2. Relevant equations Sum(Forces) = 0 Sum(Torques) = 0 3. The attempt at a solution From Sum(Forces) = 0: Ff = mg - TCosθ For torques: This is where I am confused: Considering torques with respect to the point of junction between the string and the wall: In counterclockwise: torque due to tension TLCosθ In clockwise: torque due to friction? I'm at a conceptual misunderstanding here!