Dr. Gundersen Phy 205DJ Final Exam 12 May 2010 [4.] In class we worked through the 'loop-the-loop' problem in which a mass slides down a hill and just barely makes its way around the circular 'loop-the-loop' without falling. We found that the minimum height of the hill needed to be = R where R was the radius of the loop. In this problem, we consider a small, uniform density ball of mass m, radius r (