# Homework Help: Multiple Pulley/Friction system

1. Oct 16, 2011

### frostmephit

1. The problem statement, all variables and given/known data
In the given figure, the coefficient of kinetic friction between the two blocks shown is 0.30

a) Assume that the surface of the table and the pulleys are frictionless. Determine the acceleration of each block and the tension in the strings.

b) If the coefficient of kinetic friction between the table and the bottom block is now also 0.30, determine the acceleration of each block and the tension in the strings.

2. Relevant equations
F = ma
Ffr = FN($\mu$k)
FN = mg

3. The attempt at a solution
ƩFx = Ft1 + ($\mu$k)(g)(m1m2)
I'm stuck. I know that the calculations of the tension are dependent on the friction, but I'm not quite sure how to calculate the friction and tension.

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2. Oct 18, 2011