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1. |
In an epicyclic gear train, the sun gear on the input shaft is 20 teeth external gear. The planet gear is a 40 teeth external gear and the ring gear is a 100 teeth internal gear. The ring gear is fixed and the sun gear is rotating at 60 rpm counter clockwise. The arm attached to output shaft will rotate at ________ |
A. | 5 rpm |
B. | 10 rpm |
C. | 20 rpm |
D. | 30 rpm |
Answer» C. 20 rpm | |