Compare the Force for helmet with base radius of 10 cm vs helmet with 30 cm

The slope of a velocity time graph over any interval of time gives the during that interval

Which atomic model was proposed as a result of j. j. thomson’s work?

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,?