State similarities and differences of gravitational and electrost… - Vidyadip

Question

State similarities and differences of gravitational and electrostatic forces.

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Answer

i. Similarities:
a. Both forces obey inverse square law:
$F \propto \frac{1}{r^2}$
b. Both are central forces and they act along the line joining the two objects.
ii. Differences:
a. Gravitational force between two objects is always attractive while electrostatic force between two charges can be either attractive or repulsive depending on the nature of charges.
b. Gravitational force is about 36 orders of magnitude weaker than the electrostatic force.

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