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Homework Statement
Homework Equations
The Attempt at a Solution
I don't know how to make the equations here.
When the balls are penetrating each other, a cavity is being formed due to overlap of the negative and positive charges. The size of this cavity keeps on increasing. The trouble is I cannot figure out the instant of maximum velocity and the equations to write down. I need a few hints to begin with.
Any help is appreciated. Thanks!
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