Dear friends, Here's a problem I can't solve. The disk on the picture falls under influence of gravity. The horizontal table creates no friction and the string that binds mass m and the disk is rolled up around the disk. The center of mass of the disk falls vertically. My question is: what's the condition it has to satisfy, so that this last statement is true? Do you think it's true that the disk will fall faster if it were attached to the pole? Thanks for your help!