question_answer

A uniform metal chain is placed on a rough table such that one end of it hangs down over the edge of the table. When one-third of its length hangs over the edge, the chain starts sliding. Then, the coefficient of static friction is:

A)  \[\frac{3}{4}\]                                  

B)  \[\frac{1}{4}\]

C)  \[\frac{2}{3}\]                  

D)         \[\frac{1}{3}\]

E)  \[\frac{1}{2}\]