Chapter 12, Problem 76CP

When a motor is set on a pivoted mount seen below, its weight can be used to maintain tension in the drive belt. When the motor is not running the tensions $T_1$ and $T_2$ are equal. The total mass of the platform and the motor is $100.0$ kg, and the diameter of the drive belt pulley is $16.0$ cm. When the motor is off, find: (a) the tension in the belt, and (b) the force at trhe hinged platform support at point C. Assume that the center of mass of the motor plus platform is at the center of the motor.