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.
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.
70.5 KB Views: 346