Posted by **Bon Oncle** on Monday, May 2, 2011 at 3:06pm.

Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This alignment corresponds to a solar eclipse.) Does the orbit of the Moon ever actually curve away from the Sun, toward the Earth? (Please give your answer to three significant figures.)

I used G m1 m2/r^2 to get the forces, for the force between the Earth and the moon I did:

((6.67e-11)(5.97e24)(7.35e22))/(1.737e6 - 6.37e6)^2

and I got 1.36e24 N

To get the r value I substracted the radii... do I have to add them?

For the force between the Sun and the Moon, I used the distance from earth to the sun and substracted it from the distance between moon to earth.

((1.737e6 - 6.37e6)- (6.96e8 -6.37e6))=6.95e8 m

and then for the moon to sun force I computed:

((6.67e-11)(7.35e22)(1.9891e30))/(1.737e6 - 6.37e6)^2

and I got 1.40e34 N...

These answers are not right but I'm not sure what I'm doing wrong...

## Answer This Question

## Related Questions

- physics - Calculate the magnitudes of the gravitational forces exerted on the ...
- Physics (please help) - Calculate the magnitudes of the gravitational forces ...
- Physics (please check!!!) - Calculate the magnitudes of the gravitational forces...
- Physics - Calculate the magnitudes of the gravitational forces exerted on the ...
- Physics (please help!!!!) - Calculate the magnitudes of the gravitational forces...
- Physics (please help!!!!) - Calculate the magnitudes of the gravitational forces...
- Physics (please help!!!!) - Calculate the magnitudes of the gravitational forces...
- Physics - Many astronomers argue that the Earth and Moon should be considered a...
- physics - The Sun and Earth each exert a gravitational force on the Moon. What ...
- Physics [Help, need answer in 10 min] - During a solar eclipse, the moon (of ...

More Related Questions