Solve Friction & Pulley Problem: Acceleration of Blocks

[metallica007]

Hello everyone... I need ur help in the following problem

Homework Statement

A perfect rope connects a 20 kg block to a 30 kg block. The rope passes over a perfect
pulley at the top of a 53 ° incline. The 30 kg block rests on the incline and the 20 kg
block hangs from the pulley. The blocks start from rest. Calculate the acceleration of
either block. (µ = 0.2)

Homework Equations

F=ma
Fk= N*uk

The Attempt at a Solution

http://img832.imageshack.us/img832/1134/26881976.jpg

the correct answer is is 0.0688 m/sec^2
Please help me to find the error in my solution

 

[PhanthomJay]

You had the correct approach and equations...but then you seemed to have reversed your m1, m2, g, and a terms. Recheck your math. Sometimes it is better to plug in the numbers right away up front, to avoid the messy algebra. But don't tell the math folks i said that