The rotor (flywheel) of a toy gyroscope has a mass of 0.140 kg. Its moment of in

Question

The rotor (flywheel) of a toy gyroscope has a mass of 0.140 kg. Its moment of inertia about its axis is 1.20×10^-4 kg*m^2 . The mass of the frame is 2.50×10^-2 kg . The gyroscope is supported on a single pivot (see the figure below ) with its center of mass a horizontal distance of 4.00 cm from the pivot. The gyroscope is precessing in a horizontal plane at the rate of 1.00 revolution in 2.20 s.

http://session.masteringphysics.com/problemAsset/1343088/2/1026462.jpg

Find the upward force exerted by the pivot.

Find the angular speed with which the rotor is spinning about its axis, expressed in .

Explanation / Answer

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CC0QFjAB&url=http%3A%2F%2Fwww2.warwick.ac.uk%2Ffac%2Fsci%2Fphysics%2Fteach%2Fmodule_home%2Fpx132%2F2005%2Fex5-2005-sol.pdf&ei=pLDCTu-lGNG0hAenl5n4DQ&usg=AFQjCNGxCVKtum4pqy2yfShTdrT_Ztbzhg&sig2=MWUPEugDePn_z5a9L4B0lw

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