As shown in the figure, a thin rod of mass M and length L is suspended by two wires—one at the left end and one two- thirds of the distance from the left end to the right end.
a) What is the tension in each wire?
b) Determine the mass that an object hung by a string attached to the far right-hand end of the rod would have to have for the tension in the left-hand wire to be zero.

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