Lecture 14 (Physics)

Newton's law of universal gravitation says the gravitational force between two particles is:

1. A.Proportional to the sum of the masses and inversely proportional to the distance between them.
2. B.Proportional to the product of the masses and inversely proportional to the square of the distance between them.
3. C.Proportional to the product of the masses and inversely proportional to the distance between them.
4. D.Proportional to the sum of the masses and inversely proportional to the square of the distance between them.