(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Here is the question from my assignment:

2. Relevant equations

3. The attempt at a solution

I did the free body diagram on the left block. The arrow pointing to the bottom is the Fg, which I will further on refer to as W, the arrow going to the top left corner is the normal force (Fn), and the one going along the cable is the tension (F_{T}).

From that I was able to get 3 equations for the left side:

F_{NL}= -F_{NL}* cos (21)i + F_{NL}*sin(21)j

F_{TL}= F_{TL}*cos(69)i + F_{TL}*sin(69)j

W_{L}= 0i -9.81*m_{L}j

Then I wrote the ones for the right side:

F_{NR}= F_{NR}*cos(60)i+F_{NR}*sin(60)j

F_{TR}= -F_{TR}*cos(30)i + F_{TR}*sin(30)j

W_{R}= 0i - 9.81*m_{R}j

So now I have six equations, resultant of which equals to 0i +0j+0k. I figured the two tensions F_{TR}and F_{TL}had to be equal because it's one string. But I will still have 3 variables even if just use F_{T}to represent both.

Help please? Thanks

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# Homework Help: 2D Forces Equilibrium Question

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