main

prev        

Statement of a problem № 3199

        next    

A hollow cylinder drum of radius r is placed with its axis vertical. It is rotated about an axis passing through its centre and perpendicular to the face and a coin is placed on the inside surface of the drum. If the coefficient of friction is n, what is the frequency of rotation so that the coin does not fall down?

Solution:
A hollow cylinder drum of radius r is placed with its axis vertical. It is rotat

New search. (Also 5349 free access solutions)