# Gravitational Potential Problem ( one simple yes/no question)

1. Oct 20, 2009

### rockstar101

1. The problem statement, all variables and given/known data

When finding the gravitational potential of a thick walled hollow cylinder from the

point P, located along the X-axis,

can I find the Gravitational potential of a solid cylinder and then subtract the
gravitational potential of a smaller (inner empty) cylinder?

2. Relevant equations

3. The attempt at a solution

This is my attempt to answer a much complicated problem.
I just need to make sure that I can subtract the two gravitational potential
to find the gp of hollow thick cylinder.

Any hint or help would be really appreciated thanks!

Last edited by a moderator: Oct 20, 2009
2. Oct 20, 2009

### tiny-tim

Welcome to PF!

Hi rockstar101! Welcome to PF!
Yes … that's exactly the way to do it.

3. Oct 20, 2009

### rockstar101

is the gravitational potential measuring from a point on Z axis same as the gp measured on a point on X axis?

4. Oct 21, 2009

### tiny-tim

(what happened to "one simple yes/no question"? )

If the Y-axis is the axis of the cylinder, yes.