Question

A uniform chain is placed on a table with a part of it hanging over the edge. It just begins to slide when it's part is 1/3rd of its length. Find coefficient of friction between table and chain?

Answer 1

let take \(\lambda\) be the mass per unit length.. and l be the total length
the the force on 1/3*l is....1/3*l* \(\lambda\)g
then f=1/3*l* \(\lambda\)g
=> \(\mu\)2/3*l* \(\lambda\)g=1/3*l* \(\lambda\)g
and \(\mu\)=1/2

Answer 2

let m be the mass per unit length
so hanging part's weight = 1/3 lmg
mass of the table chain = 2/3lm
F=mewR
1/3lmg=mew* 2/3lmg
so mew = 1/2

Answer 3

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