Unit 6: Centripetal Force & Gravitational Field

Question 1

7.2:
Which single condition enables Newton’s universal law of gravitation to be used to predict the force between the Earth and the Sun?

Answer 1

Both Earth and Sun behave like point mass.

Question 2

7.2

How to calculate the volume of earth?

Answer 2

4/3πr^3

Question 3

Definition of gravitational field strength?

Answer 3

Force acting per unit mass on a small mass placed at the point.