- #1
MicroCosmos
- 11
- 0
Hi everyone, first post here.
Today i crushed into a question. I was going to write it down here, then i crushed into another one.
Lets say we want to know the potential energy of a body relative to a center of gravity.
I will refer to gravitys acceleration as "g" and to mass as "m". "k" will be some constant unit.
If we take a near, lower height(h) as reference it would be "m·g·h" because g doesn't change with h.
But if i want to reference to the center of gravity, because of g(h) = k/h2, i can't use that anymore. I suppose i need ∫m*g(h) dh from 0 to the wanted height. That supposes potential energy is infinite at any point !
Some ideas? Am i doing something wrong?
Thanks!
Today i crushed into a question. I was going to write it down here, then i crushed into another one.
Lets say we want to know the potential energy of a body relative to a center of gravity.
I will refer to gravitys acceleration as "g" and to mass as "m". "k" will be some constant unit.
If we take a near, lower height(h) as reference it would be "m·g·h" because g doesn't change with h.
But if i want to reference to the center of gravity, because of g(h) = k/h2, i can't use that anymore. I suppose i need ∫m*g(h) dh from 0 to the wanted height. That supposes potential energy is infinite at any point !
Some ideas? Am i doing something wrong?
Thanks!