In the Figure,the Rotor of a Gyroscope Is a Uniform

Multiple Choice

In the figure,the rotor of a gyroscope is a uniform disk that has a radius of 13.8 cm and a moment of inertia about its axis of .The length of the rotor shaft is 6.9 cm.The ball pivot at P is frictionless.At a given instant,the rotor shaft is horizontal and the rotor is rotating with an angular velocity of 90 rad/s about its axis OP,as shown.The rotor is viewed from point Q on the axis.The precessional linear velocity of point O,including the direction seen from point Q,is closest to

A) 0.054 m/s, leftward.
B) 0.054 m/s, upward.
C) 0.054 m/s, rightward.
D) 0.11 m/s, downward.
E) 0.11 m/s, rightward.