The wheel has a mass of 50 kg and a radius of gyration kG = 0.4 m. If it rolls without s...

The wheel has a mass of 50 kg and a radius of gyration k_G = 0.4 m. If it rolls without slipping down the inclined plank, determine the horizontal and vertical components of reaction at A, and the normal reaction at the smooth support B at the instant the wheel is located at the midpoint of the plank. The plank has negligible thickness and has a mass of 20 kg.