Three bamboo poles anchored at points B, C, and D on the ground supports the TV antenna placed at their other end at Point A. The TV antenna with a negligible weight is subjected to a wind load equivalent to a force in the component form shown in the figure. -45î + 45k)N (0,8,0) A D (0,0,-12) B. (-6,0,2.4) (0,0,0) (8,0,4)
Three bamboo poles anchored at points B, C, and D on the ground supports the TV antenna placed at their other end at Point A. The TV antenna with a negligible weight is subjected to a wind load equivalent to a force in the component form shown in the figure. -45î + 45k)N (0,8,0) A D (0,0,-12) B. (-6,0,2.4) (0,0,0) (8,0,4)
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Transcribed Image Text:Three bamboo poles anchored at points B, C, and D on the ground supports the TV antenna placed at their other end at Point A. The TV antenna with a
negligible weight is subjected to a wind load equivalent to a force in the component form shown in the figure.
(-45î + 45k)N
(0,8,0)
A
(0,0,-12)
(-6,0,2.4)
(0,0,0)..
(8,0,4)
Transcribed Image Text:2. Which of the following gives the unit vector defining the direction of the tension on Pole AD acting at point A?
A. 0.667î + 0.667ĵ + 0.333k
B. 0.667î – 0.667ĵ + 0.333Â
C. -0.5553 – 0.832k
D. -0.583î – 0.778ĵ + 0.233k
3. Which of the following shows the correct equilibrium equation along the x-direction?
А. -0.5837лв + 0.667TAC
45 = 0
B. –0.5837AB + 0.667TAC – 0.555TAD = 0
С. - 0.778TAB — 0.667TAC - 0.555TAD 3 0
D. –0.233TAB + 0.333TAC – 0.8327TAD + 45 = 0
4. Which of the following best approximates the magnitude of the force at Pole AB?
5. Which of the following gives the tension on pole AC in component form?
A. (14.321 – 14.32j + 7.16k) N
B. (30.68i + 40.91j – 12.27k) N
(-26.59j – 39.88k) N
С.
D. (26.59j + 39.88k) N
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