Rotational motion – Flywheel problem

The flywheel has mass m & is rotating with angular velocity w.the radius of the flywheel is R. masses m1 & m2are placed over r1 & r2 radius.find the change in w due to the placing of masses? Posted by Tushar Srivastava (Waiting for your responses before posting the final solution)

Electrostatic induction – Where does the charge go on earthing?

Rajkumar asks:”in electrostatic induction in step 3 when earthed wire is removed then where the free negative charge go.does they go to earth then what happen to them.”
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