7. Consider a spur gear system shown in Figure 6. The centers of Gear 1 and Gear 2 are on the vertical line, and the centers of Gear 2 and Gear 3 are on the horizontal line. We chose the gears from the table as follows: Gear 1= (S6), Gear 2 = (S4), Gear 3 = (S5). On Gear 1, the driving torque 100 in-lb is applied. Due to the dynamic equilibrium be tween the driving torque and the resistance torque, the gears are rotating at constant speeds. Assume that no external torque is applied to Gear 2. driving torque Gear 1 Face Wd.- Gear 3 No. of Pitch Gear 2 Pressure angle 20° Spur gears Hub O'all Teeth Dia. (A) Dia. (B) OD (C) Lg. (D) Bore (51) 15 (52) 20 0.75 0.6 0.85 0.94" 38 1" 0.84 1.1" 0.94" 10 (83) 25 1.25 0.97 1.35 0.94" (54) 30 12 1.5 1.22 1.6 0.94 (55) 35 (86) 40 1.75 1.47 1.85" 1" 2 1.72 2.1 1 resistance torque 545 (a) (b) Figure 6: Find and show all the force vectors acting on Gear 2.