Gravitational and Electric Fields

Question 1

State Newton’s Law of Universal Gravitation

Answer 1

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

Question 2

Define weight (Fg)

Answer 2

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

Question 3

Define gravitational field

Answer 3

the force acting per unit mass

Question 4

State Coulomb’s law in words

Answer 4

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

Question 5

Define an electric field

Answer 5

a region of space in which a electric charge experiences a force

Question 6

Define electric field at a point

Answer 6

the force per unit positive
charge