A cannonball is launched horizontally off a cliff at 250 m/s and lands 30 s later. What was the height cliff (Ay) and range (A x) of the cannonball?
(Use format (Ay) m, (A x) m)
Please help I’m taking a quiz and this is the last question

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,?