Are the sum of all forces written correctly for this system?

AI Thread Summary
The discussion focuses on verifying the setup of the Sum of All Forces for a given system. A participant points out that the component of weight in the x direction is missing from the calculations. The correct equation for Σ FxB is provided, incorporating the necessary forces. Additionally, it is noted that since the velocity is constant, the net acceleration (ma) equals zero. The mention of the 30-degree angle raises questions about its relevance in the context.
Blockade
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Member advised to use the formatting template for questions posted to the homework forums
Can someone check if my Sum of All Forces is setup correctly?

Problem:
7b189141b5.jpg


Diagram:
http://puu.sh/o6pLY/285d7b12c1.jpg

Sum of all Forces:
2e23f577b3.jpg
 
Last edited by a moderator:
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Blockade said:
Can someone check if my Sum of All Forces is setup correctly?

Problem:
[ IMG]http://puu.sh/o6pGI/7b189141b5.jpg[/PLAIN]

Diagram:
[ IMG]http://puu.sh/o6pLY/285d7b12c1.jpg [/PLAIN]

Sum of all Forces:
2e23f577b3.jpg
You're missing a force in Σ FxB, namely the component of weight in the x direction.
 
Last edited by a moderator:
SammyS said:
You're missing a force in Σ FxB, namely the component of weight in the x direction.

Σ FxB: -mgsin(30 degrees) + T2 - T1 - μkmgcos(30 degrees) = ma

Thank you.

and all ma = 0 since velocity is constant
 
By the way: Why 30° ?
 
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