- #1
ash1262
- 12
- 0
A boy sitting on a rotating chair (ignore friction) with his hands stretched outwards, pulls in his hands thus reducing the moment of inertia of the chair-boy system. The angular velocity will increase to conserve the angular momentum.
The kinetic energy of the system will also increase (as kinetic energy = (1/2)Iωω).
What I can not understand is where does the added energy come from?
The kinetic energy of the system will also increase (as kinetic energy = (1/2)Iωω).
What I can not understand is where does the added energy come from?