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A sign of weight W = 100 N is hung from the end of a uniform horizontal boom of

ID: 1552781 • Letter: A

Question

A sign of weight W = 100 N is hung from the end of a uniform horizontal boom of length L = 5 m and mass mb = 25 kg. The boom is affixed to the side of a building through a hinge, indicated by a circled x on the diagram below. The boom is additionally supported by a cable attached at point x = 1 m from the free end of the boom and inclined at an angle of = 45o to the boom. What is the tension, T, in the cable

cable? Hinge A. 243 N B. 393 N C. 413 N D. 475 N p 513 N 2.5 m 5 m 1 m. mbge. Page 13 of

Explanation / Answer

taking the moment of arm from the left end

100 ( 5) +25 (9.8) ( 2.5) = T cos 45 ( 4)

500 + 612.5 = T (2.828)

T = 393.397 N

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