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The diameter of a disc is 1m. It has a m...

The diameter of a disc is `1m`. It has a mass of `20kg`. It is rotating about its axis with a speed of `120` rotations in one minute. Its angular momentum in `kg m^2//s` is

A

`13.4`

B

`31.4`

C

`41.4`

D

`43.4`

Text Solution

Verified by Experts

The correct Answer is:
B
`L=Iomega`Where `I=(mr^(2))/2, omega=2pin`
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