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ICSE Class 10 Answered

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Asked by nilesh.dhote74 | 25 Apr, 2020, 06:36: PM
answered-by-expert Expert Answer
i)Weight mg (W) of rule produces an anti-clockwise moment about the knife edge O. In order to balance it, 20gf 
must be suspended at the end B to produce clockwise moment about the knife edge O. 
 
 

ii)

 

From the principle of moments,

Anticlockwise moment= Clockwise moment

Wx (58-50) =20gf x (100-58)

W x 8=20gf x 42

W space equals space fraction numerator 20 g f space cross times 42 over denominator 8 end fraction space equals space 105 space g f
Answered by Shiwani Sawant | 25 Apr, 2020, 07:43: PM

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