A 600 kg satellite is in orbit 1,200,000 meters above the surface of the Earth. The mass of the Earth is 5.97E24 kg, and the radius of the Earth is 6.37E6 meters. what is The gravitational force acting on the satellite

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,?