Acomet is a a. meteoroid that travels through earth’s atmosphere and hits the surface. b. meteoroid that burns up in earth’s atmosphere, producing a streak of light. c. small, rocky object that orbits the sun and is usually found in a belt between the orbits of mars and jupiter. d. small object made of ice and dust that orbits the sun and forms a coma as it approaches the sun.

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,?