m4=m1+m2+m3=(SW+2 RA)×S L×t×l

¿0.01703 kg

Im4= 1

12m4 (SL2+( 2RA+SW )2 )

¿2.3489×10−6kg m2

I of m1 and m3 about their centres is found

m1=m3=12π r2ρt=1

2π× RA

2×ρ×t

¿2.2144×10−3 kg

Im1g1+ Im3g3

(about their c . o . g . )=12mR A

2

4.5351×10−8 kgm2

Im1o=Im3o=Im1g1+m1(RA+ SW2 )

2

¿8.7233×10−7kgm2

Im2=Im4

−Im1o−Im3o

¿604.24×10−9 kgm2

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