Problem

To lift a heavy crate, a man uses a block and tackle attached to the bottom of an I-beam a...

To lift a heavy crate, a man uses a block and tackle attached to the bottom of an I-beam at hook B. Knowing that the moments about the y and the z axes of the force exerted at B by portion .AB of the rope are. respectively, 120 N • m and −460 N • m, determine the distance a.

Fig. P3.49

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