- #1
quietrain
- 655
- 2
set up:
================ () (wheel)
|| (pivot) * take +ve y-axis directed to the right
* take +ve x-axis directed out of this screen
* take +ve z axis directed upwards
we know that weight of the wheel(-z-axis) about the pivot will produce a torque in the direction given by the right hand rule(into the screen).
if the wheel is spinning anti-clockwise, an angular momentum will direct to the +y-axis given by right hand rule.
so the torque will cause angular momentum to shift in the direction of "into the screen" .
so why does angular momentum follow the direction of the torque?
also, if right hand rule is just a convention, why does the angular momentum always seem to follow the direction of the torque in 1 way( into the screen) , instead of "out of the screen" since torque is just defined to be perpendicular to the force-radius plane?
i realize that the wheel always seem to precess in 1 direction about the pivot as a result...
anyone can solve my doubts?
thanks a lot!
================ () (wheel)
|| (pivot) * take +ve y-axis directed to the right
* take +ve x-axis directed out of this screen
* take +ve z axis directed upwards
we know that weight of the wheel(-z-axis) about the pivot will produce a torque in the direction given by the right hand rule(into the screen).
if the wheel is spinning anti-clockwise, an angular momentum will direct to the +y-axis given by right hand rule.
so the torque will cause angular momentum to shift in the direction of "into the screen" .
so why does angular momentum follow the direction of the torque?
also, if right hand rule is just a convention, why does the angular momentum always seem to follow the direction of the torque in 1 way( into the screen) , instead of "out of the screen" since torque is just defined to be perpendicular to the force-radius plane?
i realize that the wheel always seem to precess in 1 direction about the pivot as a result...
anyone can solve my doubts?
thanks a lot!