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nns91
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Homework Statement
The mass of the Earth is 5.98*10^24 kg and its radius is 6370 km. The radius of the moon is 1738 km. The acceleration of gravity at the surface of the moon is 1.62 m/s^2. What is the ratio of the average density of the moon to that of the Earth ?
Homework Equations
New's law of gravity: F= G*m1*m2/r^2
The Attempt at a Solution
I understand that I need to find mass of the moon to get its density. How should I calculate the mass of the moon ??