Similarities:
inverse square law for strength of force
both r central forces
both are conservative forces
both follow principle of superposition
Differences
gravity attracts electric force
electric force can change direction
electrostatic force depends on interviening medium
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Gravitational force is the attractive force between two masses that depends on the masses and distance between them, while electrostatic force is the attractive or repulsive force between charged particles that depends on the charges and distance between them. Both forces follow an inverse square law, meaning they decrease as the distance between the objects increases. However, gravitational force is always attractive and acts on all masses, while electrostatic force can be attractive or repulsive and acts on charged particles only.
The ratio of the electrostatic force to the gravitational force between two electrons is approximately 2.4 x 1042.
The ratio of gravitational force to electrostatic force between two electrons is approximately (3.6 \times 10^{-42}). This is because the gravitational force between two electrons is much weaker than the electrostatic force due to their small masses compared to their charges.
The electrostatic force is much stronger than the gravitational force between charged particles. It is about 10^36 times stronger than the gravitational force. Thus, at atomic and molecular scales, electrostatic forces dominate over gravitational forces.
Coulomb's force is the electrostatic force between charged particles, while gravitational force is the force of attraction between masses due to gravity. Coulomb's force depends on the amount of charge and distance between charges, while gravitational force depends on the masses and distance between objects. Coulomb's force is much stronger than gravitational force for everyday objects.
Gravitational forces are based on mass and pull objects towards each other, while electrostatic forces are based on charge and can attract or repel objects based on their charge.