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Q.

Four particles with a mass of 2 kg, 3 kg, 4 kg and 5 kg are situated at the corners of a square with side 2m (as shown in the figure). The moment of inertia of the system about an axis passing through the point ‘O’ and perpendicular to the plane of the square is
 

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a

28 kg m2

b

10 kg m2

c

18 kg m2

d

24 kg m2

answer is D.

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Detailed Solution

I=mA+mB+mC+mDr2=(2+3+4+5)222=14×42=28kgm2

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