MHT CET · Physics · Rotational Motion
A metre scale is supported on a wedge at its centre of gravity. A body of weight ' \(\mathrm{w}\) ' is suspended from the \(20 \mathrm{~cm}\) mark and another weight of 25 gram is suspended from \(74 \mathrm{~cm}\) mark balance it and the metre scale remains perfectly horizontal. Neglecting the weight of the metre scale, the weight of the body is
- A 20 gram-wt
- B 15 gram-wt
- C 33 gram-wt
- D 30 gram-wt
Answer & Solution
Correct Answer
(A) 20 gram-wt
Step-by-step Solution
Detailed explanation
Taking moments about the centre of the scale we get
\(\begin{aligned}& \mathrm{W} \times 30=25 \times 24 \\& \therefore \mathrm{W}=\frac{25 \times 24}{30}=20 \mathrm{~g}-\mathrm{wt}\end{aligned}\)
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