A crane boom 10 m long, weighing 870 N and having its center of gravity 3m from the bottom, is hinged at the lower end and makes an angle of 30° with the vertical. It is held in position by a horizontal cable fastened at the upper end. The boom supports a 4350-N load at its upper end. Find the tension in the cable.
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Expert's answer
2021-05-09T15:33:29-0400
let A lower point of the crane boom
B the upper point of the crane boom;Fb=4350
Nb−rope reaction force
C point of the center of gravity of the crane boom;Fc=870
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