Problem B9:
Consider the two objects below. One is very small (point object) with mass m, and
the other is a very thin circular arc of radius R whose mass is uniformly distributed.
The object of mass m is located at the center of the circle of the arc. The
linear density, mass per unit length, of the arc is λ. The full angle
that the arc subtends is α=(n_{1}/n_{2})π.
Find the magnitude of the net force on the object of mass m.
If the magnitude of the net force on the object equals F=(Gmλ/R)
√ n_{3},
what is n_{3}? Note that all the integers are unitless,

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