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PHYSICS

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If you increase the distance between two identical point charges so that the new distance is five times the original distance, what happens to the force between them?

I know it is suppose to be divided by 25 but why?

  • PHYSICS -

    Coulomb's Law

    F1=k•q1•q2/r²
    F2=k•q1•q2/R²
    If R=5r, then F2=F1/25

  • PHYSICS -

    It's called an inverse square law.
    Gravity of a point mass behaves the same way.

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