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The planet Gandalf has a mass of 5.2 x 10 14 kg and a radius of 6000 km. The planet Frodo has a mass of

The planet Gandalf has a mass of 5.2 x 10 14 kg and a radius of 6000 km. The planet Frodo has a mass of 3.1 x 1010 kg and a radius of 4500 km. If the distance between the surface of the planet Fro and Gandalf is 30 000 km, what is the force of gravity between these two planets?

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