What is the difference between coulombs law and gravitation law?

Answer 1

Their mathematical forms are identical. The differences are:

-- The proportionality constants. Newton's is 'G'. Coulomb's is 1/4Πε0 .

-- The variables in Coulomb's numerator are electrical charges and he doesn't care about masses.

The variables in Newton's numerator are masses and he doesn't care about charges.

(I'm not sure Newton even knew about charges.)

-- Coulomb's charges have a choice of two signs, so his forces can be attractive

or repulsive, just like the co-eds in my sophomore engineering classes. Newton's

masses are always positive, the gravitational forces are always attractive, and to

this day negative mass has never yet been observed .

Answer 2

Coulomb's law describes the electrostatic force between charged particles, while Newton's law of gravitation describes the gravitational force between masses. Coulomb's law involves electric charges and is stronger than gravitational force. Gravitational force depends on mass and distance, while electric force depends on charge and distance.