- #1
Shivanand
- 9
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Gyroscope doubts. Please answer :)
Consider the case of a common demonstration which you would find in videos. A bicycle wheel mounted on a shaft is set into rotation, axis is made horizontal and the shaft stays horizontal for sometime and eventually goes down as the wheel spin slows down due to friction.
Like this one : http://www.youtube.com/watch?NR=1&v=8H98BgRzpOM
My questions are
1) What torque balances the gravitational torque vertically and the precession torque horizontally (applying Newton's second law) ?
2) Let the torque resisting the vertical fall of shaft be R and torque due to gravity be T. Since the shaft finally tilts down is R more than T and why does this happen?
3) How is the resisting torque (against gravity) R dependent on
a)Rate of spin
b)Gravitational torque T ?
Please answer these questions
Consider the case of a common demonstration which you would find in videos. A bicycle wheel mounted on a shaft is set into rotation, axis is made horizontal and the shaft stays horizontal for sometime and eventually goes down as the wheel spin slows down due to friction.
Like this one : http://www.youtube.com/watch?NR=1&v=8H98BgRzpOM
My questions are
1) What torque balances the gravitational torque vertically and the precession torque horizontally (applying Newton's second law) ?
2) Let the torque resisting the vertical fall of shaft be R and torque due to gravity be T. Since the shaft finally tilts down is R more than T and why does this happen?
3) How is the resisting torque (against gravity) R dependent on
a)Rate of spin
b)Gravitational torque T ?
Please answer these questions