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A body of moment of inertia 2kg-m^(2) h...

A body of moment of inertia `2kg-m^(2) has a rotational kinetic energy of 4 J. What is the angular momentum of the body ?

A

`sqrt2" kg m"^(2)//s`

B

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

C

`4" kg m"^(2)//s`

D

`8" kg m"^(2)//s`

Text Solution

Verified by Experts

The correct Answer is:
C
K.E. `=(1)/(2)Iomega^(2)`
`therefore 4=(1)/(2)xx2xxomega^(2)" "therefore omega="2 rad/s"`
and Angular momentum `=Iomega`
`=2xx2="4 kg - m"^(2)//s`
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