A circular ring of mass m and radius r is rotating in a horizontal plane about an axis vertical to its plane. What will its rotational kinetic energy? (Angular speed of ring is w)

A circular ring of mass m and radius r is rotating in a horizontal pla

1.	A circular ring of mass m and radius r is rotating in a horizontal plane about an axis vertical to its plane. What will its rotational kinetic energy? (Angular speed of ring is w)
Answer» `(1)/(2)MR^(2)w^(2)` `mr^(2)w^(2)` `(1)/(2)mrw^(2)` `mrw^(2)` Solution :Rotational kinetic ENERGY = `(1)/(2)IOMEGA^(2)` but for RING `I=mr^(2)` `=(1)/(2)mr^(2)omega^(2)`