Newton's Second Law surface+horizontal w/ friction

[Fredecus]

This was a return of my test and I have filled in the forces already. I got a few problems wrong and I would like to see what the correct answers are.

Homework Statement

1. Write an expression and determine the value of N₁, the normal force acting on M₂

2. Write an expression for and determine the value of the net force acting on the system.

3. Write an expression for and determine the value of the force (Tension[T₂]) the string exerts on M₁

4. Write an expression for and determine the value of the force (Tension[T₂]) the string exerts on M₂

Homework Equations

N/A

The Attempt at a Solution

1. N₁=Mg-sin(α)=99.1

2. -30.18-.9-43.08=12N

3. T₁=-Fcos(α)+F_s-sumF_x1
T₁=0

4. T₂=sumF_x2-mgsin(θ)+F_s2
T₂=0

 

[Fredecus]

I think I have figured it out but I am too tired at the moment to post it. I will post in the morning my new answers and the questions I still have (if any).

 

[azizlwl]

1. N1=Mg-sin(α)=99.1
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Sin[α] is a ratio of 2 lenght. Force unit is in Newtons.