Homework Help: Physics

Posted by Merideth on Wednesday, September 9, 2009 at 6:53pm.

Two point charges are seperated by 6 cm. The attractive force between them is 20 N. Find the force between them when they are separated by 12 cm. (Why can you solve this problem without knowing the magnitudes of the charges?)

Physics - drwls, Wednesday, September 9, 2009 at 6:58pm
Use the inverse square rule. You have doubled the separation distance. Look at Coulomb's law and see what that does to the force.

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