## Chapter
8 Problems

**34.
**A
bicycle wheel has a diameter of 64.0 cm and a mass of 1.80 kg.
Assume that the wheel is a hoop with all the mass concentrated on
the outside radius. The bicycle is placed on a stationary stand and
a resistive force of 120 N is applied tangent to the rim of the
tire. (a) What force must be applied by a chain passing over a
9.00-cm-diameter sprocket in order to give the wheel an acceleration
of 4.50 rad/s^{2}? (b) What force is required if you shift
to a 5.60-cm-diameter sprocket?

Solution