Table Top Physics - Angular Momentum - Perpendicular Gears

We can apply a torque to give momentum 'L' to the blue flywheel. Assume no friction so no momentum is transferred to the baseplate.

 

 

 

no gears

Now we do the same, but though gears which rotate the motion through 90 degrees(again no friction), we supply angular momentum 'L' and the flywheel gains L momentum at 90 degrees. Therefore to conserve angular momentum, what angular momentum must be transferred to the baseplate.

perpendicular gears

Can we show the magnitude of the angular momentum transferred to the baseplate by calculating the forces instead of using the conservation law?

Does the offset in axies affect the result?

Further Information

These pages contain examples to illustrate the principles involved, for an discussion of the theory about angular momentum see this page.


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