A metre scale is supported on a wedge at its centre of gravity. A body of weight ' w ' is suspended from the 20 cm mark and another weight of 25 gram is suspended from 74 cm mark balance it

Question

A metre scale is supported on a wedge at its centre of gravity. A body of weight ' $w$ ' is suspended from the $20 cm$ mark and another weight of 25 gram is suspended from $74 cm$ mark balance it and the metre scale remains perfectly horizontal. Neglecting the weight of the metre scale, the weight of the body is

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Answer:

A

Solution:

Taking moments about the centre of the scale we get $W \times 30 = 25 \times 24 ∴ W = \frac{25 \times 24}{30} = 20 g - wt$

TestHub · Accepted Answer

Taking moments about the centre of the scale we get ​ W × 30 = 25 × 24 ∴ W = 30 25 × 24 ​ = 20 g − wt ​

Physics - Rotation Question with Solution | TestHub

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