A damp washcloth is hung over the edge of a table to dry. Thus, part (mass = mon) of the washcloth rests on the table and part (mass = moff) does not. The coefficient of static friction between the table and the washcloth is 0.395. Determine the maximum fraction [moff/mtotal] that can hang over the edge without causing the whole washcloth to slide off the table.
physics! (69) - drwls, Monday, February 7, 2011 at 11:38am
Net force down = static friction force ,because there will be a balance of tension forces at the edge.
moff*g = (mtot-moff)*g*(0.395)
(mtot/moff) -1 = 1/0.395 = 1.532
mtot/moff = 2.532
moff/mtot = 0.395
physics! (69) - bill, Monday, October 1, 2012 at 12:22am
physics! (69) - Doesn't matter, Sunday, February 9, 2014 at 2:46pm
that is wrong