## JenniferSmart1 2 years ago The force of gravity varies inversely with the square of the distance between given planet and the sun because $F_g=\frac{GMm}{r^2}$

1. JenniferSmart1

@Jemurray3

2. JenniferSmart1

what is the "varies" symbol again? $F\;\;\; \frac 1{r^2}$

3. Jemurray3

$\propto$ \propto which is short for "proportional to"

4. JenniferSmart1

"varies inversely" means proportional to $$\frac 1 r$$ correct? $$\frac 1 {r^2}$$

5. Jemurray3

if A varies inversely with B, you say $A \propto \frac{1}{B}$ here, you're saying "The force (A) is varies inversely with the square of the distance (B)". So A is the force, and B is r^2. $F \propto \frac{1}{r^2}$