A Uniform 300-Kg Beam, 6

question 4

Multiple Choice

A uniform 300-kg beam, 6.00 m long, is freely pivoted at P, as shown in the figure. The beam is supported in a horizontal position by a light strut, 5.00 m long, which is freely pivoted at Q and is loosely pinned to the beam at R. A load of mass is suspended from the end of the beam at S. A maximum compression of 23,000 N in the strut is permitted, due to safety. Under maximum load, find the magnitude of the x component of the force exerted on the beam by the pivot at P.

• A) 13,800 N
• B) 12,800 N
• C) 11,200 N
• D) 14,400 N
• E) 16,000 N

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