- #1
pakontam
- 6
- 0
hey, how to find the distance of two planets, say, Earth and moon? i know it can done by apply equations of circular motion and gravitation, but it seems to me that there's always a piece of information missing.
like, mass of Earth M :
mg = GMm/r^2
M = gr^2/G
u still need r to find M.
if u know what i mean.
thanks.
like, mass of Earth M :
mg = GMm/r^2
M = gr^2/G
u still need r to find M.
if u know what i mean.
thanks.