- #1
Miike012
- 1,009
- 0
what is it exactly?
and in my book they had an equation
F = (4)(pi)^2(m)(r)/T^2
then they said by using keplers law... they arrived to a new equation that relates the gravitational force exerted by the sun which is...
F = m/r^2
If Keplers law says T = r^3/2 how in the heck did they go from F = (4)(pi)^2(m)(r)/T^2
to F = m/r^2 by substituting T for r?
Where did (4)(pi)^2(r) go ?
and in my book they had an equation
F = (4)(pi)^2(m)(r)/T^2
then they said by using keplers law... they arrived to a new equation that relates the gravitational force exerted by the sun which is...
F = m/r^2
If Keplers law says T = r^3/2 how in the heck did they go from F = (4)(pi)^2(m)(r)/T^2
to F = m/r^2 by substituting T for r?
Where did (4)(pi)^2(r) go ?