a uniform metre rule is balanced on a fulcrum placed at the 35 cm Mark by
suspending a mass of 120 gram at 10 cm Mark calculate the mass of the meter rule
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The mass of a metre rule will vary considerably depending upon the material of manufacture. Commonly they tend to have a mass of around 100 g, but given the variation it is a good idea to know the mass before the students carry out the activity.
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