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

The angular momentum of rotating body is increased by 20%. What will b

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