Jason is sitting on a chair than can rotate (frictionlessly) around its vertical

Question

Jason is sitting on a chair than can rotate (frictionlessly) around its vertical axis. Jenny starts a bicycle wheel spinning in a counter-clockwise direction giving it an Angular Momentum of 150 kgm^2/s. She hands Jason the wheel while he is sitting stationary on the stool. Jason then takes the wheel and flips it upside down without interfering with its rotational speed. What will the Angular Momentum of the wheel be once Jason has flipped it upside down? What will the Angular Momentum of Jason be after he has flipped the wheel upside down?

Explanation / Answer

a) -150 kgm2/s
b) -300 kgm2/s

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