Acar traveling at 60 mph has how much more energy than a car going at 20 mph? k. e. increases by a factor of there is no increase in ke 3 times 9 times impossible to tell because the mass of the car is unknown

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,?