The 30-kg wheel has a radius of gyration about its center of 75 mm and is rotating clock...

The 30-kg wheel has a radius of gyration about its center of 75 mm and is rotating clockwise at the rate of 300 rev /min when it is released onto the incline with no velocity of its center O. While the wheel is slipping, it is observed that the center O remains in a fixed position. Determine the coefficient of kinetic friction μ_k and the time t during which slipping occurs. Also determine the velocity v of the center 4 seconds after the wheel has stopped slipping.