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This is question is originally in context to elasticity (young mod, bulk mod etc). but i want some clarity on the tension forces (or torque)

Physics Asked by mr.anonymous on May 11, 2021

I want to know what tension will there be in 2 strings if the are connected by rod and a mass is hung somewhere in between .I somewhat know the concept of torque but I am getting confused here . pls refer the image below ..
thanks for helping
EDIT: as someone pointed out that I haven’t written the length from either side you shall assume it to be l1,l2.. (I just need to know the concept anyway.)
thanks again

kindly refer this

One Answer

Simply put, express the total torque on the rod around some point if your choosing; it should be zero. Then express the total vertical force on the rod; it should be zero too.

Say you pick the point where $m$ is attached as reference. $T_1$ adds a torque about this point in one direction. $T_2$ adds a torque in the opposite direction. They need to cancel each other out since it's a static situation. Then there are the linear forces - two up and one down. They also need to cancel out. Now you have two equations and two unknowns - solve away.

Correct answer by Kristoffer Sjöö on May 11, 2021

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