Aball of putty with a mass of 0.250 kg is thrown with a velocity of +7.50 m/s directly toward a nearby wall. the putty sticks to the wall. what is the impulse on the putty as it comes to a stop

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,?