gravitational and electric fields and electrostatics

Newtons Law of Universal Gravitation

Every particle with mass in the universe attracts every other particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.

Weight(Fg)

The gravitational force the Earth exerts on any object on or near its surface

Describe a gravitational field

A region in space where a mass will experience a force

Gravitational field

The force per unit mass

Coulomb’s law

Two point charges exert forces on each other. The force is directly proportional to the product of the charges and inversely proportional to the square of the distance between charges

Describe an electric field

A region in space in which an electric charge experiences a force. The direction of the electric field at a point is the direction that a postage charge would move if placed at that point.

Electric field

The force per unit positive charge