Force System Resultants - General Questions (4)

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Force System Resultants - General Questions

25.

pg4-14

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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26.

pg4-6

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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27.

pg4-1c

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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28.

pg4-23

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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29.

pg4-17

Determine the couple moment. Use a vector analysis and express the result as a Cartesian vector.

A.	M = (800i-4800j-800k) lb-ft
B.	M = (4000i-2000j+4000k) lb-ft
C.	M = (-4000i+7000j-4000k) lb-ft
D.	M = (-800i-4800j-800k) lb-ft

Answer: Option B

Explanation:

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30.

pg4-31

A force and couple act on the pipe assembly. Replace this system by an equivalent single resultant force. Specify the location of the resultant force along the y axis, measured from A. The pipe lies in the x-y plane.

A.	R = 25k lb, y = -0.9 ft
B.	R = 25k lb, y = 0.9 ft
C.	R = 25k lb, y = 3.9 ft
D.	R = 25k lb, y = -3.9 ft

Answer: Option A

Explanation:

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31.

pg4-25

Replace the force at A by an equivalent force and couple moment at P. Express the results on Cartesian vector form.

A.	F = (60j-80k) lb, M = (20i+160j+120k) lb-ft
B.	F = (60j-80k) lb, M = (300j+560k) lb-ft
C.	F = (60j-80k) lb, M = 20i lb-ft
D.	F = (60j-80k) lb, M = (-160i-400j+120k) lb-ft

Answer: Option A

Explanation:

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32.

pg4-24

Replace the force at A by an equivalent force and couple moment at P. Express the results on Cartesian vector form.

A.	F = (-50i+20j+30k) N, M = (50i-130j+170k) N-m
B.	F = (-50i+20j+30k) N, M = (-50i+60j+60k) N-m
C.	F = (50i-20j-30k) N, M = (-50i+130j-170k) N-m
D.	F = (50i-20j-30k) N, M = (50i-60j-60k) N-m

Answer: Option C

Explanation:

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Force System Resultants - General Questions (4)

Force System Resultants - General Questions

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