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chirrag nangia Grade: 11
        

On a metre scale having reading 1cm,2cm,3cm..., masses of 1g,2g,3g,... are kept respectively


if an axis passes through the mid then wat is the moment of inertia of this body

6 years ago

Answers : (2)

vikas askiitian expert
510 Points
										

I = mr2


particles are placed at 1,2,3........& so on


I1 = m1r12 , I2 = m2r22  & so on ........


I = I1 + I2 + I3 ............... n


I = 10-7[(1)(1)2 + 2(2)2 + (3)(32)  ...................n]            ( putting m in grams & r in m)


I =  10-7[13 + 23 + 33  ..........n]


I = [n(n+1)/2 ]2 *10-7 kg-m2


here n is the number of particles ....

6 years ago
Jitender Singh
32 Points
										

this will form a series of 100(1 +2^2 +3^2 +.................50^2) soling wil give 0.8585 kg-m^2

6 years ago
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