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## Homework Statement

In the figure below, three 2.00 kg spheres are located at distances

*d*1 = 0.300 m and

*d*2 = 0.400 m. What are the magnitude and direction of the net gravitational force on sphere

*B*due to spheres

*A*and

*C*?

## Homework Equations

F = GMm/r^2

## The Attempt at a Solution

F=sqrt((4G/0.4^2)^2 + (4G/0.3^2)^2)

F = 3.0E-9

But that answer is wrong. Is there a mistake in my arithmetic? Of am i missing another term?