A rod PQ of length L revolves in a horiz...

A rod PQ of length L revolves in a horizontal plane about the axis YY´. The angular velocity of the rod is w. If A is the area of cross-section of the rod and r be its density, its rotational kinetic energy is

`(1)/(3)AL^(3)rhoomega^(2)`,

`(1)/(2)AL^(3)rhoomega^(2)`,

`(1)/(24)AL^(3)rhoomega^(2)`,

`(1)/(18)AL^(3)rhoomega^(2)`,

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