Solving Rope Tension Problem w/ Friction & Variables m1, m2 & m3

[Hitchslaps]

Homework Statement

The slop has friction.

Variables: m1=4kg , m2=2kg, m3=8kg
μ (coefficient) = 0.1
α=30°

1. What is the acceleration of the system?
2. Calculate the tension of the rope between m1 to m2 and between m2 to m3.

Homework Equations

Newton's second law and free body diagrams.

The Attempt at a Solution

Two boxes on a slope is new to me (I had experience with one so far). I'd appreciate any help, thank you.

 

[rock.freak667]

To make things easier, you can replace m1 and m2 with an equivalent mass M (i.e. M = m1+m2). So now you have a two body problem which might be easier for you to handle. Then all you need to do is draw your free body diagrams.

 

[grzz]

Follow the hint given and use

F_{net} = mass x a

for masses on the incline and for the hanging mass.