- #1
leonmate
- 84
- 1
I know:
f = ma
f = - GMm/r^2
a = -GM/r^2 can be easily derived,
But, we've been given the differential equation of motion of gas within a star as:
a = -GM/r^2 - 1/p * dP(r)/dr
I was wondering where the - 1/p * dP(r)/dr term is derived from? I can't find it in my textbooks.
Cheers
f = ma
f = - GMm/r^2
a = -GM/r^2 can be easily derived,
But, we've been given the differential equation of motion of gas within a star as:
a = -GM/r^2 - 1/p * dP(r)/dr
I was wondering where the - 1/p * dP(r)/dr term is derived from? I can't find it in my textbooks.
Cheers