Solve Semi-Atwood Machine Homework: m1=0.30kg, m2=0.45kg, θ=11°

[chrisfnet]

Homework Statement

Again, I've uploaded a diagram of the problem.

In the setup shown, m1 = 0.30kg, m2 = 0.45kg and theta = 11 degrees. Also, between the first block and the incline, coefficient of friction = 0.40. Assume the system moves so that the first block slides up the incline. (a) What is the acceleration of the system? (b) What is the tension in the string?

Homework Equations

The Attempt at a Solution

I really have no idea how to start this. First, I suppose draw FBD for both m1 and m2. Then what should I do? I'll draw them and post them to see if I'm on the right track..

 

[chrisfnet]

Here are my FBDs. I'm just not sure what to do next.

 

[Doc Al]

Once you've drawn your FBDs, use them to apply Newton's 2nd law to each mass. You'll get two force equations, which you can solve together to find the acceleration and the string tension.

 

[chrisfnet]

I do understand that.. I'm having trouble coming up with the correct equations. I'll attempt it again and post here and see what I'm doing wrong.

Thanks!