A small object of radius r and mass m is released at the edge of a round bowl with radius R>>r and rolls toward the bottom.
a) What fraction of the kinetic energy is rotational if the object is (1) a marble, (2) a coin, and (3) a point particle (i.e r=0)?
b) At the bottom of the bowl, what is the normal force on the object, in units of mg, if it is (1) a marble, (2) a coin, (3) a point particle?