Problem A16:
A person of weight W is standing on top of a step ladder as shown below.
The step ladder consists of two massless ladders, each of length l, hinged at the top.
A rope is connected to the ladders l/3 from the bottom, which keeps them from
opening up. The rope is massless, and there is no friction between the ladder
and the floor. What is the tension T in the rope? If T = W/n_{3},
what is n_{3}? Note, in the figure below n_{1} and n_{2} have
the same units of length. n_{3} is unitless.

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