Problem

Problem

Postby kate » Mon Jun 30, 2008 12:57 pm

A small ball with weight 100 g is suspended on a silk thread. The ball has charge q1 = 109. What should be the distance between this ball and another ball under this one with charge q2= 3.10-9, in order to the strain of the thread to be decreased with 1/3. The Earth acceleration is 10m/s.
kate
 
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