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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

Text Solution

Verified by Experts

The correct Answer is:
B
`L = Iomega = ((mr^(2))/2) (2pin)`
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NARAYNA-SYSTEM OF PARTICLES AND ROTATIONAL MOTION -EXERCISE - I (C.W)
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  9. A metallic circular plate is rotating about its axis without friction....

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  16. A hollow sphere rolls down a 30^@ incline of length 6m without slippin...

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  17. A ring and a disc of same mass roll without slipping along a horizonta...

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  18. A solid cylinder of mass M and radius R rolls down an inclined plane o...

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  19. A thin uniform circular ring is rolling down an inclined plane of incl...

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