Posted by **Ashley** on Wednesday, November 17, 2010 at 3:43pm.

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 3.30 m. Two of the spheres have a mass of 3.10 kg each. The third sphere (mass unknown) is released from rest. Considering only the gravitational forces that the spheres exert on each other, what is the magnitude of the initial acceleration of the third sphere?

- physics -
**bobpursley**, Wednesday, November 17, 2010 at 3:46pm
Well, the force on the third is GMm/3.3^2 * 2 cos30

so the acceleratoin of the third must be F/m=a=GM/3.3^2 * 2 cos30

check that.

- physics -
**Ashley**, Wednesday, November 17, 2010 at 3:56pm
So, for the acceleration I got 1.096e-11 is this right?

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