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The angular momentum of rotating body is...

The angular momentum of rotating body is increased by `20%`. What will be the increase in its rotational kinetic energy ?

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Kinetic energy K.E. `=(L^(2))/(2I)` `E alphaL^(2)`
`(E+DeltaE)/(E )=((120)/(100))^(2)` (or) `(DeltaE)/(E )=0.44`
`(DeltaE)/(E )xx100=44%`
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