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# Engineering Mechanics - Internal Forces

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### Exercise

• General Questions
"Loneliness is the most terrible poverty."
- Mother Teresa
1.

Determine the internal axial force, shear force, and moment at point F of the frame.

 A. AF = 0, VF = 750 lb, MF = 750 lb-ft B. AF = 1500 lb, VF = 0, MF = 4500 lb-ft C. AF = 0, VF = 1500 lb, MF = 4500 lb-ft D. AF = 750 lb, VF = 0, MF = 750 lb-ft

2.

The work platform supports an 80-kg man having a mass center at G. Determine the axial force, shear force, and bending moment at point E of the telescopic column AB due to the load of the man only.

 A. AE = 785 N C, VE = 0, ME = 785 N-m B. AE = 785 N C, VE = 392 N, ME = 0 C. AE = 785 N T, VE = 392 N, ME = 0 D. AE = 785 N T, VE = 0, ME = 785 N-m

3.

Determine the internal axial force, shear force, and moment at point E of the oleo strut AB of the aircraft landing gear.

 A. AE = 9.33 kip C, VE = 8.00 kip, ME = 80.0 kip-in. B. AE = 11.11 kip T, VE = 6.67 kip, ME = 66.7 kip-in. C. AE = 9.33 kip T, VE = 8.00 kip, ME = 80.0 kip-in. D. AE = 11.11 kip C, VE = 6.67 kip, ME = 66.7 kip-in.

4.

A force of 500 N acts at the top of the two-member frame. If the members are in smooth contact with one another at A, B, and C with no fasteners, determine the shear force developed at a horizontal section through point D of the support. Also, what are the axial force, shear force and moment at point E?

 A. VD = 250 N, AE = 250 N, VE = 333 N, ME = 316 N-m B. VD = 333 N, AE = 333 N, VE = 250 N, ME = 267 N-m C. VD = 333 N, AE = 333 N, VE = 250 N, ME = 200 N-m D. VD = 250 N, AE = 250 N, VE = 333 N, ME = 267 N-m

5.

The axial forces act on the shaft as shown. Determine the internal axial force at points A and B.

 A. AA = 0, AB = 10 lb C B. AA = 0, AB = 10 lb T C. AA = 10 lb C, AB = 0 D. AA = 10 lb T, AB = 0