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Precession of Rotating Rigid Body from Two Different Frames
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[QUOTE="TSny, post: 5846359, member: 229090"] For part (A) you are working with body-fixed axes. So, the ##x_1## and ##x_2## axes are attached to the rotating gyroscope and rotate with the gyroscope. You can take the orientation of the axes at ##t = 0## to be as you described, with the ##x_1## axis into the page and the ##x_2## axis along the yellow line. But after a quarter revolution of the gyroscope, the ##x_1## axis will now be in the direction of the yellow line and the ##x_2## axis will point out of the page. At this instant, the torque has zero ##x_1## component and a negative ##x_2## component. The way you chose the axes, so that the ##x_1## and ##x_2## axes do not spin with the gyroscope, corresponds to the "precessing frame" of part (B). [/QUOTE]
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Precession of Rotating Rigid Body from Two Different Frames
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