State the fundamental law of electrostatics

According to this law, the force exerted between two point charges

i) is directly proportional to the product of their strengths.

ii) is inversely proportional to the square of the distance between them. and

iii) is inversely proportional to the absolute permittivity of the surrounding medium.

This is known as Coulomb's Law.

moving ball hits still ball. mover stops, hit ball moves. momentum transfer.