(Solved):
In the epicyclic gear train shown in Figure 2, the annular gear B has 140 teeth externally ...
In the epicyclic gear train shown in Figure 2, the annular gear B has 140 teeth externally and 120 teeth internally. Gear D has 70 teeth. The drive shaft is keyed to gear A, which has 20 teeth. The arm \( \mathrm{E} \) is connected to the driven shaft. Figure 2 Determine the speed and direction of rotation of the output shaft under the following two cases: (a) Gear A rotates at \( 100 \mathrm{rev} / \mathrm{min} \) clockwise and gear D rotates at \( 40 \mathrm{rev} / \mathrm{min} \) anticlockwise. (b) Gear A rotates at \( 100 \mathrm{rev} / \mathrm{min} \) clockwise and gear D is fixed.