# College level physics help

## Homework Statement

Image attached. This figure shows the force on a 0.1-kilogram mass at various distances from Earth. Notice that the force decreases as the square of the distance. Now, consider satellites A and B, both circling Earth. If A has ten times the mass of B but B is 1/10 of the distance to the center of Earth as is A, what is the gravitational force on A relative to that of B due to Earth?
1/100 times as much
100 times as much
1/10 the amount
10 times as much
the two are equal

G=m_1*m_2/ r^2

## The Attempt at a Solution

I used my textbook and numerous notes and could not figure out a wAy to attempt this problem. Any pointers would be great.

## Answers and Replies

The relevant equation is not $$G = \frac {m_1 m_2} {r^2}$$ It is $$F = G \frac {m_1 m_2} {r^2}$$

Now, let ## M ## be the mass of the Earth, ## m_A ## be the mass of A, ## m_B ## the mass of B, ##r_A## and ##r_B## the distances from the Earth to A and B, respectively. What is ##F_A## and ##F_B##? What is ##F_A/F_B##?