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A uniform meter scale is kept in equilib...

A uniform meter scale is kept in equilibrium when supported at the 60 cm mark and a mass weight of the scale is greater than, less than or equal to the weight of mass M.

Text Solution

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The weight of the scale W will act from 50 cm mark. By principle of moments,
`"Load "xx" load arm" = "Effort "xx" effort arm"`
`W xx (60-50) =M xx (90-60)`
`implies W xx 10 M xx 30`
`implies W=3M`
Hence weight of scale is three times the mass M.
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