The rotor (flywheel) of a toy gyroscope has mass 0.140 kg. Its moment of inertia about its axis is 1.2010^-4 kg?m². The mass of the frame is 0.0250 kg. The gyroscope is supported on a single pivot with its center of mass a horizontal distance 4.00 cm from the pivot. The gyroscope is precessing in a horizontal plane at the rate of one revolution in 2.20 s.

A. Find the magnitude of the upward forcenexerted by the pivot. Enter your answer in newtons to three significant figures.

B. Find the angular speed ? at which the rotor is spinning about its axis, expressed in revolutions per minute. Enter your answer in revolutions per minute to three significant figures.