Asked by Bob

-When the masses were 2 x 10^5 km apart, the gracitational force was 4 x 10^20 N. What is the force when the distance is halved and they are 1 x 10^5 km apart?

-Describe a trend you notice in the (mathematical) relationship between distance and gravitational force.
Answered by oobleck
since F is inversely proportion to d^2, half the distance means 4 times the force.