Diagram shows two shafts A B and C D of 35 millimeter diameter and 300 millimeter and 900 millimeter respectively, are connected using two gears, B with 100 millimeter diameter and C with 200 millimeter diameter. A torque T is applied at the end of C D at D. An internal torque T subscript 2 in applied on C D toward C. Parameters: d = 35 millimeter, G = 80 gega Pascal, T = 685 Newton meter.

Assume a positive internal torque in shaft (2). From the free-body diagram, write the equilibrium equation:

M2=T-T2=0

 T2=T=+685 N-m