Problem A14:
In the figure below, a weightless plank has a weight W resting on
it. It is held up by two strings having tensions of T_{1}
and T_{2}. The left string makes an angle &theta degrees with
the horizontal, and the right string makes an angle of (90-&theta) degrees
with the horizontal. The weight W has a value of W = n_{1} T_{2}.
The plank is n_{2} units long. What is the distance n_{3} that
the weight W is from the left end of the plank? n_{3} = ?
Note that n_{1} is unitless, and that n_{2} and n_{3}
have the same units of length.

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