- #1

- 362

- 0

M(r)=v

^{2}r/G

And also I've seen

M(r)=vrc

^{2}/G

Which if any is right?

And what do I use for v?

Thanks so much for your help!

- Thread starter StephenPrivitera
- Start date

- #1

- 362

- 0

M(r)=v

And also I've seen

M(r)=vrc

Which if any is right?

And what do I use for v?

Thanks so much for your help!

- #2

- 362

- 0

M(r)=Mr/R, where M is the total mass of the galaxy and R is the radius of the galaxy

I'm trying to do a tidal force calculation to see how far away from the center of a galaxy a star needs to be to be tidally disrupted by a nearby galaxy. I'm getting

r=(d

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