He mass of mars is 6.42 × 1023 kg. its moon phobos is 9378 kilometers away from mars and has a mass of 1.06 × 1016 kg. what is the gravitational force between mars and phobos? 5.16 × 1015 n 5.16 × 1021 n 4.84 × 1022 n 4.84 × 1025 n

The gravitational force between two objects is determined using the formula:
F = (GMm)/r^2, where F is the gravitational force between the two masses, G is the gravitational constant (6.67*10^-11), M and m are the masses of the two objects, and r is the distance between them. Substitute the given values and note that r = 9378 km must first be converted to meters to be consistent with the units. Thus, the gravitational force between Mars and Phobos is 5.16*10^15 N. 

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