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A homogenous disc of mass 2 kg and radiu...

A homogenous disc of mass 2 kg and radius 10 cm is rotating about its axis with an angular velocity of 4 rad `s^(-1)`. The angular momentum of the disc is :

A

1 kg `ms^(-1)`

B

0.6 kg `ms^(-1)`

C

1.2 kg `ms^(-1)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`I=(1)/(2)mr^(2)=(1)/(2)xx2(0.1)^(2)=0.01kgm^(2)`
Now angular momentum
`L=Iomega=0.01xx4=0.04kgm^(2)s^(-1)`
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