Problem C15:
An object of mass m is thrown up vertically into the air with an initial
speed v_{0}. It travels to a maximum height h and returns to the
ground. The object's speed when it hits the ground is v. During its
travel through the air, the **force of air friction is constant**, and
equal to f. If v/v_{0} = (n_{1}/n_{2})^{1/2}
what is f? If f=mv_{0}^{2}/(hn_{3}), what is
n_{3}? Note that n_{1}, n_{2} and n_{3}
are unitless.

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