Topic 6 & 10

Question 1

Newton’s Universal law of Gravitation

Answer 1

The force between two objects is directly proportional to the product of the two masses and inversely proportional to the square of the distance between them

Question 2

Gravitational field strength

Answer 2

Gravitational force per unit mass on a point mass

Question 3

Gravitational potential energy

Answer 3

The work done in moving a mass from infinity to a point in space

Question 4

Gravitational potential

Answer 4

The work done per unit mass in moving a mass from infinity to a point in space

Question 5

Electrical potential energy

Answer 5

Energy that a charge has due to its position in an electric field

Question 6

Electric Potential

Answer 6

Work done per unit charge moving a small positive test charge in from infinity to a point in an electric field

Question 7

Equipotential surface

Answer 7

Every point on it has the same potential

Question 8

Escape speed

Answer 8

Minimum speed an object needs to escape the gravitational attraction of a planet