7. Two particles of masses 2 gm and 8 gm are separated by 10 cm. Find the moment of inertia of the system about an axis passing through centre of mass. 1)320gm-cm2 2) 160 gm-cm2 3) 80 gm-cm2 4) 40 gm-cm
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Answer:
Correct option is D)
MOI=1(1)
2
+2(2)
2
+3(3)
2
=36gmcm
2
Radius of gyration=K
then
(1+2+3)K
2
=36
K=
6
=2.449cm
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