- #1

TalliThePrune

- 11

- 0

## Homework Statement

:[/B]"Calculate gravitational potential at point Z, which is 8.10 x 10

^{7}m away from a planet of mass 1.08 x 10

^{23}. "

(This point is between the planet and a moon, where the gravitational field strength is zero. I'm not sure if that makes a difference. The moon's mass is 4.8 x 10

^{22}and point Z is 5.4 x 10

^{7}m away from it.).

## Homework Equations

V = - G M / r

## The Attempt at a Solution

V = - (6.67 x 10^-11) x (1.08 x 10^23) / (8.1 x 10^7)

Therefore

V = - 8.89 x 10^4 J/kg

Is this correct?

Many thanks in advance.

- Talli