Look up the moment of inertia for a disk, and the sphere.
flywheel(disk)=Ifly*w
sphere=Isphere*ws
set them equal, solve for ws
put radii in meters...
A 10-kg disk-shaped flywheel of radius 9.0 cm rotates with a rotational speed of 320 rad/s.
Determine the rotational momentum of the flywheel.
With what magnitude rotational speed must a 10-kg solid sphere of 9.0 cm radius rotate to have the same rotational momentum as the flywheel?
1 answer