Question
Fri January 21, 2011 By: Topper Getahead
a heavy uniform chain lies on horizontal table on top.if coefficient of friction between the chain and the table surface is 0.25,then the maximum friction of length of chain that can hang over the edge of the table is
a.)20%
b

plzzzzzzz provide proper solution and reasoningg

Expert Reply
Fri January 21, 2011
Dear student,
 
Let m = mass of chain,
l = length of chain, l'= is the maximum length of chain that can be hung over one edge of the table.
mass per unit length = m/l
At equilibrium,
 
mue X (1-l')(m/l) X g = l' (m/l) X g,
Hence solving, we get
l' = 0.2 l
Friction = l'/l X 100 = 20%
 
Hope this helps.
Team
Topperelarning.com
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