In the pivoted motor mount shown the weight W of the 175-lb motor is used to maintain tens...

In the pivoted motor mount shown the weight W of the 175-lb motor is used to maintain tension in the drive belt. Knowing that the coefficient of static friction between the flat belt and drums A and B is 0.40, and neglecting the weight of platform CD,determine the largest couple that can be transmitted to drum B when the drive drum A is rotating clockwise.