고체역학 (Beer) — Principal Stresses Under a Given Loading: Problem 8.29

8.29 The solid shaft AE rotates at 600 rpm and transmits 60 hp from the motor M to machine tools connected to gears G and H. Knowing that \(\tau_{\text{all}} = 8 \text{ ksi}\) and that 40 hp is taken off at gear G and 20 hp is taken off at gear H, determine the smallest permissible diameter of shaft AE.