A flywheel with a moment of inertia 6.00 × 10⁶ kg∙m² is spinning with an angular speed of 120 rev/s about a vertical axis while it sits at the north pole. The disk is turning counterclockwise when viewed from above. The disk is brought to a rest. Treat the earth as a uniform sphere with a mass 5.976 × 10²⁴ kg and a radius 6.374 × 10⁶ m.
(a) What will be the magnitude of the change in angular momentum of the earth?
(b) What will be the change in length of a day on Earth?

Question

Quizplus · Accepted Answer

The Answer of A flywheel with a moment of inertia 6.00 × 10⁶ kg∙m² is spinning with an angular speed of 120 rev/s about a vertical axis while it sits at the north pole. The disk is turning counterclockwise when viewed from above. The disk is brought to a rest. Treat the earth as a uniform sphere with a mass 5.976 × 10²⁴ kg and a radius 6.374 × 10⁶ m. (a) What will be the magnitude of the change in angular momentum of the earth? (b) What will be the change in length of a day on Earth?

A Flywheel with a Moment of Inertia 6