1. The problem statement, all variables and given/known data (see attachment for image) A steel ball is released from a ramp and enters at the position marked. Draw and explain the paths taken by both balls (explain the difference between the paths) 2. Relevant equations 3. The attempt at a solution So the smaller ball follows a path with a smaller radius than the larger curve the larger ball is moving faster BUT how does this explain why the curve is greater (mv2/r is the force needed for the steel ball to move in a circle BUT there surely are not any extra forces supplying the required centripetal acceleration). I would have presumed that frictional forces don't really change as the steel ball is smooth?