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Far out in space, very far from any other gravitating objects, two spheres are located 1...

Far out in space, very far from any other gravitating objects, two spheres are located 1 m apart (center-to-center distance). The mass of sphere A is 23 kg, while the mass of sphere B is 15 kg. Sphere B is released from rest while sphere A is held in place at the origin of the coordinate system. What is the kinetic energy of the sphere B once it has moved 0.4 m toward sphere A? Your answer should be in nJ (nanojoules = 10-9 J), but enter only the numerical part in the box.

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