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posted by  ms529 on 11/5/2009 1:42:05 AM  |  status: Live  |  Earned Karma: 25

Static Equilibrium of Beam

Course Textbook Chapter Problem Needs by
Calculus Based Physics Physics for Scientists and Engineers (6th) by Tipler, Mosca 12 58GP 11/6/2009 at 8:00:00 PM
Question Details:
Steel construction beams have a weight of 22 pounds per foot. A new business in town has hired you to place its sign on a 4.0 m long steel beam of this type. The design calls for the beam to extend outward horizontally from the front brick wall. It is to be held in place by a 5.0-m-long steel cable. The cable is attached to one end of the beam and to the wall above the point at which the beam is in contact with the wall. During an initial stage of construction, the beam is not to be bolted to the wall, but to be held in place solely by friction. (a) What is the minimum coefficient of friction between the beam and the wall for the beam to remain in static equilibrium? (b) What is the tension in the cable in this case?
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