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Engineering Mechanics - Structural Analysis

@ : Home > Engineering Mechanics > Structural Analysis > General Questions

Exercise

  • General Questions
"Weakness of attitude becomes weakness of character."
- Albert Einstein
1. 

Determine the force in each member of the truss and indicate whether the members are in tension or compression.
A. CB = 447 N C, CD = 200 N T, DB = 800 N C, DE = 200 N T,
BE = 447 N T, BA = 894 N C, AE = 800 N T
B. CB = 447 N T, CD = 200 N C, DB = 800 N T, DE = 200 N C,
BE = 447 N C, BA = 894 N T, AE = 800 N C
C. CB = 894 N T, CD = 800 N C, DB = 800 N T, DE = 800 N C,
BE = 894 N C, BA = 1789 N T, AE = 800 N C
D. CB = 894 N C, CD = 800 N T, DB = 800 N C, DE = 800 N T,
BE = 894 N T, BA = 1789 N C, AE = 800 N T
2. 

The principles of a differential chain block are indicated schematically in the figure. Determine the magnitude of force P needed to support the 800-N force. Also compute the distance x where the cable must be attached to bar AB so the bar remains horizontal. All pulleys have a radius of 60 mm.
A. P = 80 N, x = 240 mm
B. P = 80 N, x = 180 mm
C. P = 40 N, x = 180 mm
D. P = 40 N, x = 240 mm
3. 

Determine the magnitude of the forces in pins B and D of the four-member frame.
A. B = 503 lb, D = 225 lb
B. B = 225 lb, D = 503 lb
C. B = 56.3 lb, D = 125.8 lb
D. B = 125.8 lb, D = 112.5 lb
4. 

Determine the force in members FF, FB, and BC of the Fink truss and indicate whether the members are in tension or compression.
A. BF = 693 lb T, FG = 1800 lb C, BC = 1212 lb T
B. BF = 8660 lb C, FG = 3600 lb C, BC = 1212 lb T
C. BF = 3810 lb T, FG = 3600 lb C, BC = 1212 lb T
D. BF = 1732 lb T, FG = 2400 lb C, BC = 1212 lb T
5. 

The floor beams AB and BC are stiffened using the two tie rods CD and AD. Determine the force along each rod. Assume the three contacting members at B are smooth and the joints at A, C, and D are pins.
A. T = 480 lb
B. T = 520 lb
C. T = 1248 lb
D. T = 1152 lb

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