Tension in ropes w/o acceleration or friction

[JLPG]

Homework Statement

Two blocks are connected by a massless string and are held in position by another massless string along a frictionless incline (as shown in the figure). Let M1 = 11.0 kg, M2 = 67.0 kg, and theta = 39°.

Calculate the tension in the string connecting the two blocks.


What is the tension in the string which connects mass M2 to the wall?

Homework Equations

The Attempt at a Solution

What objects am I suppose to look at? All I found was force of the x and y components of each block

 

[cheahchungyin]

(M1+M2)g sin(39)=Tension connecting M2 to the wall. <---Because the string have to support two weights at and angle.
(M1)g sin(39)=Tension connecting M1 to M2. <--- Because the string only supports one weight at an angle

 

[JLPG]

Thank-you. It worked! I got confused with which one was m1 and which one was m2... Stupid me :/

 

[cheahchungyin]

eh? (67+11)9.8 sin(39) is for the string connecting M2 to wall
and for the second equation, its not 67 but 11. so, 11(9.8) sin39