When the Earth, Moon, and Sun form a right triangle with the Moon located at the right angle, as shown in the figure below, the Moon is approaching its third quarter. (The Earth is viewed here from above its north pole.) Find the magnitude and direction of the net force exerted on the Moon. Give the direction relative to the line connecting the Moon and the Sun.
Figure: http://www.webassign.net/walker/12-21alt.gif

answers in N for first question and ° counterclockwise from the Moon-to-Sun ray for second question.

I have no idea how to do this question. Thank you!

Question

When the Earth, Moon, and Sun form a right triangle with the Moon located at the right angle, as shown in the figure below, the Moon is approaching its third quarter. (The Earth is viewed here from above its north pole.) Find the magnitude and direction of the net force exerted on the Moon. Give the direction relative to the line connecting the Moon and the Sun. 
Figure: http://www.webassign.net/walker/12-21alt.gif

answers in N for first question and ° counterclockwise from the Moon-to-Sun ray for second question.

I have no idea how to do this question. Thank you!

experimentx · Answer

find the force of gravitation attraction .. between two objects  individually due to sun and earth on moon.

Add the components of forces and get the resultant force

anonymous · Answer

ok, I will try that. I'm a little confused on how to find the direction..

experimentx · Answer

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