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## Homework Statement

The suspended 2.29 kg mass on the right is

moving up, the 1.3 kg mass slides down the

ramp, and the suspended 7.7 kg mass on the

left is moving down. There is friction between

the block and the ramp.

The acceleration of gravity is 9.8 m/s2 . The

pulleys are massless and frictionless.

[PLAIN]http://img816.imageshack.us/img816/6190/009q.png [Broken]

What is the acceleration of the three block

system?

Answer in units of m/s2

## Homework Equations

The sum of Fx= N-mgcostheta=o => N=mgcostheta

The sum of Fy= mgsintheta-usN=0=> mgsintheta-us(mgcostheta)

## The Attempt at a Solution

are these the correct eqations for this?

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