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If two electrically charged objects attract each other with a force of 1.0N when they are 5.0cm apart, what will be the force between them when they are 1.0cm apart? 

 Apr 11, 2019
 #1
avatar+28125 
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The force is inversely proportional to the square of the distance between them, so:

 

F2/F1 = (r1/r2)2.  

 

Here you have r1 = 5cm, r2 = 1cm, F1 = 1N

 

Can you take it from here?

 Apr 11, 2019

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