Monday
October 20, 2014

Homework Help: Physics

Posted by Sandhya on Saturday, February 6, 2010 at 6:45pm.

A thin insulating thread of length L is attached to a point on the perimeter of a thin disk.
Disk is has radius R< L and is charged with a uniform surface density, σ>0. At the end of
the thread there is a small ball mass m and charge q>0. The mass happens to be located
on disk's axis. What is the mass of the ball?

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