1. The problem statement, all variables and given/known data a solid metal ball of mass M and radius R is rolling without slipping down and incline. A static friction force of magnitude f is acting on the ball. What is the magnitude of the torque due to static friction? a.) zero b.) rfcos theta c.) rfsin theta d.)Rf e. MRF 2. Relevant equations ki+ui=kf=uf (conservation of energy) 3. The attempt at a solution since the ball is rolling without slipping, why is there friction involved? do we just simply ignore friction, so the answer will just be the definition of torque: rfsin theta ?