Problem B12:
George is swinging on a playground swing. The length of the swing is l,
and George's weight is W. At the bottom of the swing, George's speed
is v=n_{1} meters/sec. The value of l times g is equal to
lg = n_{2} (meters/sec)^{2}. If the swing is held up
by two ropes, what is the tension T in each rope. That is, if
T = n_{3} W/2, what is n_{3}? Note, that if the speed were
zero, the tension in each rope would be W/2.

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