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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

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

10 years ago

Answers : (2)

vikas askiitian expert
509 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 ....

10 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

10 years ago
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