1. In the planetary gear train shown, the sun gear 2 has 40 tech and the internal ring gear 4 has 80 teeth. Gear 2 rotates counter - clockwise at ω2 = 150 rad/s, while gear 7 is held stationary.
(a) Calculate the number of teeth of gear 3 =
(b) Calculate the speed and direction of rotation of the arm.
2. In the compound planetary gear train shown in the figre Z1 = 50, Z2 = 25, Z3 = 45, Z4 = 30 and Ze has 40 teeth. The arm rotates clockwise at Warm = 50w and ω6 = 20 rpm
(a) Find ω3
(b) Find ω2