9.2.11
In the differential gear with internal gearing, the gear 1 and the crank OA rotate independently of each other with angular velocities? 1 = 2 rad / s and? OAA = 4 rad / s. Determine the angular velocity of the gear 2 if the radius r1 = 30 cm and the crank length OA is equal to 20 cm (Answer 2)