- #1
euroazn
- 12
- 0
Hi, I'm practicing for the physics olympiad qualifier and I came across this problem:
A spaceborne energy storage device consists of two equal masses connected by a tether and rotating
about their center of mass. Additional energy is stored by reeling in the tether; no external forces
are applied. Initially the device has kinetic energy E and rotates at angular velocity wEnergy is
added until the device rotates at angular velocity 2w What is the new kinetic energy of the device?
I know that E=.5Iw^2, but why does Ioda decrease by a factor of two?
Thanks.
A spaceborne energy storage device consists of two equal masses connected by a tether and rotating
about their center of mass. Additional energy is stored by reeling in the tether; no external forces
are applied. Initially the device has kinetic energy E and rotates at angular velocity wEnergy is
added until the device rotates at angular velocity 2w What is the new kinetic energy of the device?
I know that E=.5Iw^2, but why does Ioda decrease by a factor of two?
Thanks.