A demonstration gyroscope wheel is constructed by removing the tire from a
bicycle wheel 0.650 m in diameter, wrapping lead wire around the rim, and
taping it in place. The shaft projects 0.200 m at each side of the wheel, and
a woman holds the ends of the shaft in her hands. The mass of the system
is 8.00 kg; its entire mass may be assumed to be located at its rim. The shaft
is horizontal, and the wheel is spinning about the shaft at 5.00 rev/s. Find
the magnitude and direction of the force each hand exerts on the shaft (a)
when the shaft is at rest; (b) when the shaft is rotating in a horizontal
plane about its center at 0.050 rev/s; (c) when the shaft is rotating in a
horizontal plane about its center at 0.300 rev/s. (d) At what rate must the
shaft rotate in order that it may be supported at one end only?