Simple question need answering please (1 Viewer)

[sabdow]

1. Given that the moon is 60 Earth-radii from the Earth's centre and the acceleration due to gravity at the Earth's surface is 9.8 m.s -2, calculate the acceleration of the moon towards the Earth.


Thankyou. (I am not sure which formula to use)

 

[Glen88]

g = G mE .
(rE + altitude)2

[FONT=&quot] [/FONT]g = (6.67x10-11)(7.35x1022) / (6.38x106 + 60(6.38x106)2
= 3.24 x 105 m.s-1

 

[sabdow]

I figured it out myself just now

after you use G m1 m2 all over r^2

you then use that as the Force

.: F = ma
A = f / m
A = (whatever the answer is) / mass of moon