Finding meter stick mass using rotational equilibrium

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Yes, thank you for your help. :)
 
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Jasonn said:
Yes, thank you for your help. :)

You're welcome.

Hopefully, you now see the answer to your question "if I use 70 cm instead of 50 cm, I will get a different mass"...

The answer is that you don't get to pick the distance of the mass...The experiment will tell you that only one distance (for a given mass and a given position of the ruler on your finger) will keep the system at equilibrium.

godo luck!