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# Newtonian Gravity- Physics Question watch

1. Question: https://imgur.com/a/VsqQa

Information from F5.16 was mass of moon orbiting planet=2.4x10^22kg, mass of planet= 7.2x10^24kg, orbital radius is 2.5x10^8, gravitational potential half way is -3.9x10^6
2. Right so since graviational potential is a scalar, you need to subtact the potential due to the moon from the potential due the planet from the given position. Remember though that gravitational potentials are negative.

So you would get an equation:

- V(planet) - - V(moon)
Right so since graviational potential is a scalar, you need to subtact the potential due to the moon from the potential due the planet from the given position. Remember though that gravitational potentials are negative.

So you would get an equation:

- V(planet) - - V(moon)
Oh, Alright, Thanks

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