(a) A disk of mass M and radius R is held up by a massless string, as shown in Fig. The surface of the disk is frictionless. What is the tension in the string? What is the normal force per unit length the string applies to the disk?

(b) Let there now be friction between the disk and the string, with coefficient ??¼. What is the smallest possible tension in the string at its lowest point?

Transcribed Image Text:

IR