Rope Tension Problem

1. Mar 10, 2014

Hitchslaps

1. The problem statement, all variables and given/known data

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.

2. Relevant equations

Newton's second law and free body diagrams.

3. 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.

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2. Mar 10, 2014

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.

3. Mar 10, 2014

grzz

Follow the hint given and use

F$_{net}$ = mass x a

for masses on the incline and for the hanging mass.