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Keeping moment of inertia constant, the ...

Keeping moment of inertia constant, the angular momentum of a body is increased by 20%. The percentage increase in its rotational kinetic energy is

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