- #1

- 28

- 0

## Homework Statement

If we have a dancer that is spinning on her toes (wherein she is wearing a metal shoe with a very very very sharp tip) with her CG located above that tip, what is the contact friction?

## Homework Equations

F= mu_k*N (where in this case N=mg)

## The Attempt at a Solution

I'm wondering if an infinitesimally small point will give 0 friction force?

in which case in reality, the point of rotation has a certain contact area (say 0.01mm^2 radius) with the normal force as mg/area?

Cheers for all the help ;)