A flywheel having a radius of gyration of 2m and mass 10 kg rotates at an angular speed of 5 rad s^(-1) about an axis perpendicular to it through its centre. The kinetic energy of rotation is

A flywheel having a radius of gyration of 2m and mass 10 kg rotates at

1.	A flywheel having a radius of gyration of 2m and mass 10 kg rotates at an angular speed of 5 rad s^(-1) about an axis perpendicular to it through its centre. The kinetic energy of rotation is
Answer» 500 J 2000 J 1000 J 250 J Solution :`I=mK^(2)=10(2)^(2)=40 "kg-m"^(2)` `K_(R)=(1)/(2)I omega^(2)=(1)/(2)(40)(5)^(2)=500J`