Angular momentum of body changes by 80 kg `m^(2)//s`, when its angular velocity changes from 20 rad/s to rad/s. Then the change in its kinetic energy
Angular momentum of body changes by 80 kg `m^(2)//s`, when its angular velocity changes from 20 rad/s to rad/s. Then the change in its kinetic energy is
A. 1200 J
B. 1800 J
C. 1600 J
D. 2400 J
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Correct Answer - D
`L_(2)-L_(1)=I(omega_(2)-omega_(1))`
`KE_(2)-KE_(1)=(1)/(2)I(omega_(2)^(2)-omega_(1)^(2))`
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