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Engineering and Comp Sci Homework Help
What is the Tension in the Tower Crane Cable?
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[QUOTE="SoylentBlue, post: 4991993, member: 540681"] [h2]Homework Statement [/h2] The beam ABC is1000LBs and its center of mass is given as 6.5ft to right of B. B is a pin joint. A & D are frictionless rollers. Find tension in cable.[h2]Homework Equations[/h2] Call the tension in the cable T. Trig shows us that the left-hand triangle is 45 degrees at ABD and the right-hand triangle is 15.5 degrees at BCD. Torque due to wt of load and mass of beam are clockwise and negative; torques due to T are ccw and positive.[h2]The Attempt at a Solution[/h2] So the torque at B should be: -(6.5ft)(1000Lb) + -(12ft)(3000LB) + (18ft)(sin15.5)T + (5ft)(sin45)T=0 This yields a T of 5114; the book shows the answer as 6770. What am I missing? [/QUOTE]
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What is the Tension in the Tower Crane Cable?
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