A uniform metre scale of mass 1 kilogram is to balance 70 cm mark find from where a mass of 60 gram be suspended to do so
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(i) Diagram of the given arrangement is shown below.
(ii) As the given meter scale is a uniform scale. So its centre of gravity lies at 50 cm. Let mass of meter scale be W1 kg.
By principle of moments,
m1x1 = m2x2
m1 x (70 - 50) = 0.05 x (94 - 70)
m1 = 0.05 x 24/20
= 0.06 kg.
= 60 gm.
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