View Single Post
Oct20-10, 02:21 PM
P: 21
If there is no friction, it could work.

Because the speed is not constant the F_z also is not constant. So it would be more difficult.

Or other question:
What is the difference between a pointmass and a coin rolling like this?

When a point rolls like this it is quite easy to get R(z) or Z(r) cause they are inverse functions.