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21-70. The 1-lb top has a center of gravity at point G. If it
spins about its axis of symmetry and precesses about the
vertical axis at constant rates of w, = 60 rad/s and
w, = 10 rad/s, respectively, determine the steady state
angle 0. The radius of gyration of the top about the z axis is
k. = 1 in., and about the x and y axes it is k, = k, = 4 in.
w, = 10 rad/s
w, = 60 rad/s
3 in.

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