Show Gear Rotations  
scene 11 of 12
Diagram shows a gear B, with 100 millimeter diameter, is placed above the gear C with 200 millimeter diameter. A shaft passes through gear C. A torque T in counter clockwise direction is applied on the shaft at D, a torque T subscript A in clockwise direction is applied on the shaft at A . The angular displacement of the shaft at A is phi subscript 1. The x-axis passes through the shaft.

Let's review the rotations in the system, looking from another viewpoint:

Torque T1 in shaft (1) creates a twist angle of: