- #1

Brilli

- 48

- 0

## Homework Statement

A horizontal platform rotates around a vertical axis

at angular velocity ω. A disk with radius R can freely rotate

and move up and down along a slippery vertical axle situated

at distance d > R from the platform’s axis. The disk is pressed

against the rotating platform due to gravity, the coefficient of

friction between them is µ. Find the angular velocity acquired

by the disk. Assume that pressure is distributed evenly over

the entire base of the disk.

d

## Homework Equations

[/B]

## The Attempt at a Solution

My problem is with understanding the problem in first place. The diagram given is probably not correct and if is can someone help me out to find what actually is the problem about? I feel the disk radius as given R is wrong.