Engineering Mechanics - Force System Resultants

Exercise :: Force System Resultants - General Questions

  • Force System Resultants - General Questions
16. 

Replace the loading system acting on the post by an equivalent force and couple system at point O.

A. F = (-8i-66j) lb, M = 220 lb-ft
B. F = (-8i-66j) lb, M = 160 lb-ft
C. F = (4i78j) lb, M = 220 lb-ft
D. F = (4i78j) lb, M = 100 lb-ft

Answer: Option D

Explanation:

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17. 

Determine the magnitude and direction of the moment of the force of the movement if the force at A about point P.

A. Mp = 17.86 kNm
B. Mp = 1.072 kNm
C. Mp = 9.86 kNm
D. Mp = 14.93 kNm

Answer: Option C

Explanation:

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18. 

Determine the moment of the force at A about point P. Use a vector analysis and express the result in Cartesian vector form.

A. MP = (-6i+6j-4k) N-m
B. MP = (24i+8j+9k) N-m
C. MP = (-6i-6j-4k) N-m
D. MP = (24i-8j +9k) N-m

Answer: Option C

Explanation:

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19. 

Determine the magnitude and direction of the couple shown.

A. M = 1200 N-m CW
B. M = 400 N-m CCW
C. M = 400 N-m CW
D. M = 1200 N-m CCW

Answer: Option A

Explanation:

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20. 

Determine the magnitude and direction of the moment of the force at A about point P.

A. Mp = 0.707 kN-m
B. Mp = 5.66 kN-m
C. Mp = 5.70 kN-m
D. Mp = 4.50 kN-m

Answer: Option B

Explanation:

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