1. The problem statement, all variables and given/known data Consider a homogenous ball constrained to move on a horizontal plane. Show that when the ball is rolling without slipping on the plane, then the total horizontal force on the ball must be zero. HINT: Consider the ball as a rigid body and suitably combine the equations describing the rotation with the rolling constraints. 2. Relevant equations None 3. The attempt at a solution None. Been thinking about this for two days so I need a starter please.