Suppose the Earth (mass 6.0 x 10 kg) has an excess of
positive charge and the Moon (mass 7.3x 1022 kg) has an equal
excess of positive charge. Calculate the size of the charge
required so that the electrostatic force between them
balances the gravitational force between them.
Mass of earth =
Mass of moon =
Let the charges on both earth and moon be equal to and .
as said in the question charge are equal
now applying the condition electrostatic force balance gravitational force .
=
=
=
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