Rotational Inertia of a centrifuge physics question?

Question

A centrifuge has a rotational inertia of 7.24 10-3 kg ·m2. How much energy must be supplied to bring it from rest to 419 rad/s?

Answer 1

Ke=(1/2) I w^2
Ke=Work needed
Ke=(1/2) 7.24 E -3 (419)^2=636 J

Answer 2

Inertia of physique is a sources by utilizing distinctive characteristic of which the physique opposes to alter in its state of action or relax. So, in accordance to this in case you push a e book that is on a table you may experience that it's going to start up shifting in easy terms after the rush has reached to a definite shrink. same experiments may well be carried out with pencil or the different merchandise.