Flywheel -- Why does it reverse direction after spinning to a stop?

[sophiecentaur]

It's just a matter of 'to bounce or not to bounce', surely. The general implication of the OP is wrong.

 

[Muti]

every rotating equipment need two things for smooth operation: balancing (simply mean, its mass must be homogeneous and alignment (simply mean, the two end which keep the fly wheel in proper place must be in a line) or else as DaveC told there would be wibbly-wobble (Vibrations). I think this set up is about function of fly wheel. Initially the work is done by string and weight due to gravity force, but when the string reach its end no further work can be done but fly wheel has stored energy due to its inertia... Ideally flywheel will give its energy in the form of torque in the same direction, but perhaps some one else give reason how it change its direction (may be due to third law of motion...)[PLAIN]https://www.physicsforums.com/members/davec426913.15808/[/PLAIN]