Question

A uniform beam of mass 108 kg and length 5 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 40 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. Consider the image below:

Fig: 1

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