The earth has a mass me = 5.98 · 1024 kg and the moon has a mass mm = 7.36 · 1022 kg. the distance from the center of the earth to the center of the moon is r = 3.82 · 105 km. what is the gravitational force between the earth and moon?

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?