Question

A rops lies on a table such a part of it hangs down the table. When the length of hanging part is 1/3 of entire length the rops just begins to slide. The coefficient of friction between the rops and the table is :-

• A. $\frac{2}{3}$
• B. $\frac{1}{2}$
• C. $\frac{1}{3}$
• D. $\frac{1}{6}$

Answer 1

The correct option is B $\frac{1}{2}$

$\mu$ = Coefficient of friction

Apply motion of equation

or

$\mu \left(\frac{2}{3}L\right)\times mg=\frac{1}{3}\left(L\right)\times mg$

$\mu =\frac{1}{2}=0.5$