|reverse gears||How is angular momentum conserved with gears that reverse the direction of rotation?|
|perpendicular gears||How is angular momentum conserved with gears that change the direction of rotation through 90 degrees?|
|rotating platform||What is the angular momentum when we have one rotating object on top of another?|
|rotating flywheel||What is the angular momentum in this situation?|
These pages contain examples to illustrate the principles involved, for an discussion of the theory about angular momentum see this page.