Force Vectors - General Questions (4)

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Force Vectors - General Questions

25. 

pg2-11

Determine the magnitude and direction of the resultant force.
A. R = 80.3 lb, thetaa = 106.2° CCW
B. R = 80.3 lb, thetaa = 73.8° CCW
C. R = 72.1 lb, thetaa = 63.6° CCW
D. R = 72.1 lb, thetaa = 116.4° CCW

Answer: Option A

Explanation:

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26. 

pg2-21

Express force F as a Cartesian vector; then determine its direction angles.
A. F = (-2i +j+2k) kN, alpha (11) = 48.2°, betaa = 70.5°, gamma = 48.2°
B. F = (-2i +j+2k) kN, alpha (11) = 131.8°, betaa = 70.5°, gamma = 48.2°
C. F = (-4i +j+4k) kN, alpha (11) = 48.2°, betaa = 70.5°, gamma = 48.2°
D. F = (-4i +2j+4k) kN, alpha (11) = 131.8°, betaa = 70.5°, gamma = 48.2°

Answer: Option B

Explanation:

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27. 

pg2-9

Determine the magnitude of the resultant force by adding the rectangular components of the three forces.
A. R = 29.7 N
B. R = 54.2N
C. R = 90.8 N
D. R = 24.0 N

Answer: Option A

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28. 

pg2-20

The cord is attached between two walls. If it is 8 m long, determine the distance x to the point of attachment at B.
A. x = 7.75 m
B. x = 7.68 m
C. x = 6.93 m
D. x = 7.94 m

Answer: Option B

Explanation:

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