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 = (8i66j) lb, M = 220 lbft _{}  B. 
F = (8i66j) lb, M = 160 lbft _{}  C. 
F = (4i78j) lb, M = 220 lbft _{}  D. 
F = (4i78j) lb, M = 100 lbft _{} 
Answer: Option D
Explanation:

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:

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. 
M_{P} = (6i+6j4k) Nm  B. 
M_{P} = (24i+8j+9k) Nm  C. 
M_{P} = (6i6j4k) Nm  D. 
M_{P} = (24i8j +9k) Nm 
Answer: Option C
Explanation:

19. 
Determine the magnitude and direction of the couple shown. 
A. 
M = 1200 Nm CW  B. 
M = 400 Nm CCW  C. 
M = 400 Nm CW  D. 
M = 1200 Nm CCW 
Answer: Option A
Explanation:

20. 
Determine the magnitude and direction of the moment of the force at A about point P. 
A. 
Mp = 0.707 kNm _{}  B. 
Mp = 5.66 kNm _{}  C. 
Mp = 5.70 kNm _{}  D. 
Mp = 4.50 kNm _{} 
Answer: Option B
Explanation:
