At a particular instant the magnitude of the gravitational force exerted by a planet on one of its moons is 8×1021 N. Part 1 (a) If the mass of the moon were 9 times as large, what would the magnitude of the force be? |F→| = N Part 2 (b) If instead the distance between the moon and the planet were 9 times as large (no change in mass), what would the magnitude of the force be? |F→| = N