# 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 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 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

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

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 