Question

2.87

Problems55 the magnitsde and direction of the force F 2.81 A force acts at the origin of a coordinate system in a direction l by the angles 869.3 and e 57.9. Knowing that the y compo- nent of the force is -174.0 lb, determine (a) the angle ,, (b) the o components and the magnitude of the foree. 2.82 A force acts at the origin of a coordinate system in a direction defined by the angles &-70.9 and &-144.9. Knowing that the z compo- nent of the force is -520 lb, determine (a) the angle 6,, (b) the other com- ponents and the magnitude of the force. components F, and F. b) the angles a, and components Fy and F., (b) the angles e, and , 2.83 A force F of magnitude 230 N acts at the origin of a coordinate sstem. Knowing that &- 32.5" F -60 N, and F,>0, determine (a) the 2.84 A force F of magnitude 210 N acts at the origin of a coordinate sstem. Knowing that F,-80 N, e,-151.2", and F. < 0, determine (a) the 250 2.85 A rectangular plate is supported by three cables as shown. Know- ing that the tension in cable AB is 408 N, determine the components of the 360 130 force exerted on the plate at B 360 2.86 A rectangular plate is supported by three cables as shown. Know- ing that the tension in cable AD is 429 N, determine the components of the Dimensions in mm force exerted on the plate at D. Fig. P2.85 and P2.86 2.87 A transmission tower is held by three guy wires anchored by bolts at B, C, and D. If the tension in wire AB is 525 lb, determine the components of the force exerted by the wire on the bolt at B. 100 ft D & 20 ft 25 ft 74 ft 20 ft 60 ft 18 ft Fig. P2.87 and P2.88 88 A transmission tower is held by three guy wires anchored by bolts

Answer 1

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