A rope of length `30cm` is on a horizontal table with maximum length hanging from edge `A` of the table. The coefficient of friction between the rope and table is `0.5`. The distance of centre of mass of the rope from `A` is

A uniform chain of length L is lying partly on a table the remaining part hanging down from the edge of the table. If the coefficient of friction between the chain and the table is 0.5, what is the minimum length of the chain that should lie on the table, to prevent the chain from slipping down to the ground ?

A uniform rope of total length l is at rest on a table with fraction f of its length hanging (see figure). If the coefficient of friction between the table and the chain is mu then

A uniform rope of length l and mass m hangs over a horizontal table with two third part on the table. The coefficient of friction between the table and the chain is mu . The work done by the friction during the period the chain slips completely off the table

A chain lies on a rough horizontal table. It starts skidding when one fourth of it’s length hangs over the edge of the table. The coefficient of static friction between the chain and the surface of the table is

A uniform chain of mass.m. and length .L. is kept on a horizontal table with half of its length hanging from the edge of the table. Work done in pulling the chain on to the table so that only 1/5 th of its length now hangs from the edge is