Posted by **Amponsah** on Monday, April 9, 2012 at 4:26am.

A spacecraft of mass 500kg lands on the moon. Calculate the moon's gravitational pull on it given that mass of the moon is 7.5 x 10^22kg and radius of the moon is 1.6 x 10^6m.

- Science -
**drwls**, Monday, April 9, 2012 at 10:07am
The value of "g' " on the moon is

G*M/R^2, where

G is the universal gravity constant.

(Look it up if you don't know it)

M is the moon's mass

R is the moon's radius.

You should get a value of about

g' = 1.63 m/s^2, about 1/6 of the value at the surface of the Earth.

For the Moon's pull on a 500 kg mass (in Newtons), multiply 500 by g'.

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