13 Nov
2017
13 Nov
'17
9:03 a.m.
On Nov 11, 2017, at 11:08 AM, Andy Latto <andy.latto@pobox.com> wrote:
Place a coin with radius 3 on the table, and then place a coin with radius 1 touching it and above it. Roll the small coin without slipping all the way around the large coin, until it is above it again. How many revolutions does the small coin make?
Andy I gave this on a mechanics exam, with equal radius coins. The instructions were to first work out the relationship between the two angular velocities (motion of the center, rotation about the center).
-Veit