Finding the Mass of a Metre Rule

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Thak you for sharing this. You made it simple an easy to learn. Thank you.

Newchem
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why do the g cancel each other ? i don’t understand

stherh_mthembu
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I have a question that the mass should not be the mass of the ruler to the left from the fulcrum? That's confuse

賀文堯
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Thank you sir very simple to understand 🙏🏻🙏🏻🙏🏻

shalinvaidya