Tension in ropes w/o acceleration or friction

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Homework Help Overview

The problem involves two blocks connected by massless strings on a frictionless incline, with specific masses and an angle provided. Participants are tasked with calculating the tension in the strings connecting the blocks and the wall.

Discussion Character

  • Mixed

Approaches and Questions Raised

  • Participants discuss the forces acting on the blocks and the components of tension in the strings. There is an attempt to clarify which mass corresponds to which block and how to approach the calculations based on the incline angle.

Discussion Status

Some participants have offered equations relating to the tensions in the strings, while others express confusion regarding the identification of the masses. There is an acknowledgment of differing interpretations of the problem setup.

Contextual Notes

Participants are navigating potential confusion regarding the roles of the masses and the angles involved in the calculations. The problem is framed within the constraints of a homework assignment, which may limit the information available for discussion.

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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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