Where should a second electron be placed to balance Earth's gravitational force?

[satya_narayan]

Homework Statement

An electron is in a vacuum near the surface of the Earth. Where should a second electron be placed so that the electrostatic force it exerts on the first electron balances the gravitational force on the first electron due to Earth ?

Homework Equations

The Attempt at a Solution

 

[tiny-tim]

Welcome to PF!

An electron is in a vacuum near the surface of the Earth. Where should a second electron be placed so that the electrostatic force it exerts on the first electron balances the gravitational force on the first electron due to Earth ?

Hi satya_narayan! Welcome to PF!

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