I Gyroscope Question - Textbook wording

  • Thread starter sjogosk
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Summary
So basically this book is talking about how a wheel of a gyroscope will fall if there is no initial angular momentum. This book states that the torque is causing the wheel to rotate around the "y axis" even though the wheel is physically placed on the x-axis and rotating around the x-axis. I am just confused as to how i the wheel rotating downward around the y axis.
Torque.png
 
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What they're talking about here is the case where the wheel is not spinning. So it isn't spinning around the x-axis at all. The gyroscope is initially pointed along the x-axis. If you let go of it, it just falls over, staying in the x-z plane. Since the foot of the gyro is fixed at the pivot, that means the whole gyro is rotating about the y-axis.
 
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Thank you that clears it up a lot
 

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