Rankers Physics
Topic: Work Energy and Power
Subtopic: Potential Energy & Equilibrium

If potential energy between electron and proton at a distance r is given by U =-(ke²/3r³), then force acting is
F = ke²/r²
F = ke²/r

Solution:

Force F = - dU/dr = d ((ke²/3r³))/dr = ke²/r^4

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