*3-16. Determine the stretch of each spring for equilibrium of the 20-kg cylinder. Problem 3-16 KAD=400 N/m KAB= = 300 N/m KAC B -3 m = 200 N/m 4 m 3m
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- 3-21. The 10-lb weight is supported by the cord AC and roller and by the spring. If the spring has an unstretched length of 8 in., and the weight is in equilibrium when d = 4 in , determine the stiffness k of the spring. Problems 3-20/21 A 12 in. BProblem 5-78 Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of the pulley A is transmitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaction at journal bearing C and thrust bearing D if 0=45°. The bearings are in proper alignment and exert only force reactions with the shaft. 300 mm 250 mm 200 mm 65 N 80 mm A 80 N -150 mm -50 NIn figure shown, the unstretched length of spring AC is 3 m. If the block is held in the equilibrium position, determine the mass of the block at D. 3 m- 4m- KAc=20 N/m 3m KAB=40 N/m KAD=30 N/m
- Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. F₁ = 70 N F2=80 N Unique Values for F 300 mm F3 = 40 N 8= 44 44° 250 mm 200 mm F₁ F2 80 mm A 150 mm BProblem Statement Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. 300 mm 250 mm 200 mm 80 mm D 150 mm F3 F1=70N F2=85N F3=50N Theta=38 degreesProblem Statement Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. 300 mm 250 mm 200 mm 80 mm D 150 mm F3 F1=55N F2=75N F3=40N Theta 55 degrees
- Problem Statement Based on Problem 5-74 from the textbook. The bend rod is supported at A, B, and C by smooth journal bearings. Determine the components of reaction at the bearings if the rod is subjected to the force F. The bearings ar ein proper alignment and exert only force reactions on the rod. F= 815 N e= 1.95m d= 1.00 m f= 2.20 m 30° 60° F B d f 0.75 m4/31 Determine the forces in members GH and CG for the truss loaded and supported as shown. Does the statical indeterminacy of the supports affect your caleulation? Ans. CG = 70.7 kN T, GH = 100 kN T, No 4 m H 4 m G 4m F 4 m A 4 m B. 4 m C. 4 m D 60 E 50 kN Problem 4/31The weightless bars AB and CE, together with the 5-lb weight BE, form a parallelogram linkage. The ideal spring attached to D has a free length of 2 in. and a stiffness of 7.5 lb/in. Find the two equilibrium positions that are in the range 0/2, and determine their stability. Neglect the weight of slider F.
- Problem Statement Based on Problem 5-74 from the textbook. The bend rod is supported at A, B, and C by smooth journal bearings. Determine the components of reaction at the bearings if the rod is subjected to the force F. The bearings ar ein proper alignment and exert only force reactions on the rod. F=815m d=1.00m e=1.90 m f=2.20 m 30° 60° B d f 0.75 m4/71 The automobile bumper jack is designed to support a 4000-N downward load. Begin with a free-body di- agram of BCD and determine the force supported by roller C. Note that roller B does not contact the ver- tical column. Ans. C 6470N 150 mm 150 mm 400 mm- A 4000 N 100 mm B 240 mm D E F 1000 mm- Problem 4/711- Determine equilibrium the angle 9 for and investigate the stability of the mechanism in this position. The spring has a stiffness of k = 1.5 kN/m and is unstretched when 8 = 90°. The block A has a mass of 40 kg as shown in Fig.1. Neglect the mass of the links. quin 450 mm