# A uniform beam of mass 138 kg and length 7 m is pinned at its left end so that it is free to rotate about

A uniform beam of mass 138 kg and length 7 m is pinned at its left end so that it is free to rotate about that end.  Its right end rests against a vertical, slippery wall such that the beam makes a 57 degree angle with the horizontal.  Calculate the normal force the vertical wall exerts on the beam, in N.  Even though the force points to the left your answer should be a positive number. ( answer to the fourth decimal place – i.e 14.3225)

(550 words)

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