Using Newton's 2nd law, find and expression for vcrit t, the speed of the block at the critical moment when the block leaves the surface of the globe. Assume that the height at which the block leaves the surface of the globe is hcrit.

Express speed in terms of R, hcrit, and g, the magniture of acceleation due to gravity.

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,?