ll Sprint O i 82% 12:35 AM X Copy of Beer,Joh... 4.8 Two external shafts of a gearbox are subject to the torques (or moments) shown. Determine the vertical components of the forces that must be exerted by the bolts at A and B to maintain the gearbox in equilibrium 600 lb ft 100 lb-ft 7.5 KN B ус E A 30 in В Fig. P4.8 1.5 m 0.5 m 0.75 m 0.75 m 4.9 Three loads are applied as shown to a light beam supported by cables attached at B and D. Neglecting the weight of the beam, determine the range of values of Q for which neither cable becomes slack when P = 0. Fig. P4.9 20 kN 4.10 The 10-m beam AB rests upon, but is not attached to, supports at C and D. Neglecting the weight of the beam, determine the range of values of P for which the beam will remain in equilibrium. A В С D 4.11 The maximum allowable value of each of the reactions is 50 kN, and 2 m 3 m 3 m 2 m each reaction must be directed upward. Neglecting the weight of the beam, determine the range of values of P for which the beam is safe Fig. P4.10 and P4.11 4.12 For the beam of Sample Prob. 4.2, determine the range of values of P for which the beam will be safe, knowing that the maximum allowab le value of each of the reactions is 25 kips and that the reaction at A must be directed upward. 150 N 50 N 100 N OA 4.13 The maximum allowable value of each of the reactions is 180 N Neglecting the weight of the beam, determine the range of the dis tance d for which the beam is safe |В 450 mm 450 mm 4.14 For the beam and loading shown, determine the range of the distance Fig. P4.13 a for which the reaction at B does not exceed 100 lb downward or 200 lb upward 300 lb 300 lb -6 in.- B A D C 50 lb 8 in 12 in 4 in 75 mm, Fig. P4.14 300 mm A 4.15 The required tension in cable AB is 1200 N. Determine (a) the vertical force P that must be applied to the pedal, (b) the corresponding reac- tion at C 125 mm 4.16 Determine the maximum tension that can be developed in cable AB if the maximum allowable value of the reaction at C is 2.6 kN. Fig. P4.15 and P4.16 4.17 Two links AB and DE are connected by a bell crank as shown 150 lb, determine (a) the ten- Fill out form EU 4.5 in 3 in 90°