# Newtons laws of universal gravitation

**1. The problem statement, all variables and given/known data**

its 3.8 x 10^8 from Earth’s core to the lunar’s core

calculate the gravitational attraction exerted by earth on the moon

**2. Relevant equations**

ag = GM/ r^2

G= 6.67 x 10^-11

M of earth= 5.98 x 10^24 … r= 6.37 x 10^6

M of moon= 7.36 x 10^22 … r= 1.74 X 10^6

**3. The attempt at a solution**

ag = ( 6.67 x 10^-11)( 7.36 x 10^22) / ( 6.37 x 10^6) ^2 = 0.12 N

I’m not sure if i’m right or not, I am just really confused as to where I plug in the numbers

http://ift.tt/1eQv0HN

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