gravitational and electric fields

State Newton's 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

• Use the equation for Newton's Law of Universal Gravitation t

Describe a gravitational field

a region in space where a mass

will experience a force

Define gravitational field

as the force acting per unit mass

Coulombs 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 the charges

Describe an Electric field

a region of space in which an

electric charge experiences a force. The direction of the

electric field at a point is the direction that a positive test

charge would move if placed at that point

Define electric field at a point

the force per unit positive

charge