1. The problem statement, all variables and given/known data A force(Fi) is acting on the top point of a disc of radius r and mass m. The disc is rolling without slipping. Angular velocity of disc after center has been displaced distance x is? 2. Relevant equations Energy conservation; Moment of inertia of disc (MR^2)/2 3. The attempt at a solution By energy conservation Fx=1/2*Mr^2/2*w^2+1/2mv^2 also v=rw (Rolling) What am I missing? Any help appreciated.