Tension in ropes w/o acceleration or friction

AI Thread Summary
The discussion focuses on calculating the tension in two strings connecting two blocks on a frictionless incline. The blocks have masses M1 = 11.0 kg and M2 = 67.0 kg, with an incline angle of 39°. The tension connecting M2 to the wall is determined by the combined weight of both blocks, while the tension between M1 and M2 is based solely on M1's weight. The calculations involve using the sine of the angle to account for the incline. The participant successfully clarifies their confusion regarding the identification of the masses in the equations.
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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°.
1262751-1315-setDynamics_no_friction-prob6--prob26a.gif


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