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## Homework Statement

2 masses, 5k and 10kg are fixed in place at the coordinates 1,0 and 1,1 respectively. what combined gravitational field strength do they produce at the point 0,0?

## Homework Equations

g = GM/r^2

## The Attempt at a Solution

total g = G(5)/(1)^2 +G(5)/2

not the right answer though -- answer is 6.16 X 10^-10 @ 22.5 degrees

please help!