Posted by Lilly on Saturday, June 9, 2012 at 11:31am.
m1=20 kg, a=3 m,
I1 =m•a²/6 = 20•9/6 =30 kg•m²
m2 =0.6 kg , b =a•√2/2=3•√2/2 =2.13 m.
I2 =mb²=0.6•2.13²= 2.7 kg•m²
m3 = 0.8 kg, c=a/2 =1.5 m.
I3=mc²=0.8• 1.5² =1.8 kg•m².
I =I1+4•I2+4•I3 = 30+4•(2.7+1.8) =48 kg•m².
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