Aball is attached to a vertical rod by two strings of equal strength (able to support much more than one of these balls) and equal length. the strings are light and do not stretch. the rod begins to rotate with its rotational speed increasing slowly, causing the ball to revolve with slowly increasing speed. which string breaks first? a. the bottom string breaks first. b. the top string breaks first. c. the strings break at the same time.

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,?