PART II – CHOOSING THE APPROPRIATE UNIT For each example below choose the appropriate unit to measure each (mm, cm, m or km). 1. Width of physics book 2. Distance from New York to Utah 3. Length of fingernail 4. Length of hallway 5. Height of a mountain 6. Length of a fork 7. Distance between cities 8. Width of your eyeball

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,?