2.6.11
A horizontal force F = 50 N and a pair of forces with a torque of M = 20 N · m are applied to a homogeneous skating rink with a weight of 4 kN. Determine the smallest radius R of the roller, at which it will roll to the left, if the friction coefficient of rolling? = 0.005 m and OA = 0.6R. (Answer 0.50)