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A symmetrical body is rotating about its...

A symmetrical body is rotating about its axis of symmetry, its moment of inertia about the axis of rotation being 1 `kgm^(2)` and its rate of rotation 2 rev/s. The angular momentum is :

A

1.257 kg `m^(2)//s`

B

12.57 kg `m^(2)//s`

C

13.57 kg `m^(2)//s`

D

20 kg `m^(2)//s`

Text Solution

Verified by Experts

The correct Answer is:
B
Given, I = 1 `kgm^(2)`, n = 2rps
`" "omega=2pin=2pi times 2=4pi" "rad//s`
`" "L=Iomega=1(4pi)=12.57" kg "m^(2)//s`
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