The belt on the portable dryer wraps around the drum D, idler pulley A, and motor pulley B...

The belt on the portable dryer wraps around the drum D, idler pulley A, and motor pulley B. If the motor can develop a maximum torque of M = 0.80 N m. determine the smallest spring tension required to hold the belt from slipping. The coefficient of static friction between the belt and the drum and motor pulley is µs = 0.3.