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A block of mass 0.1 kg is attached to a ...

A block of mass 0.1 kg is attached to a cord passing through a hole in a horizontal frictionless horizontal surface as shown in the figure. The block is originally revolving at a distance of 0.4 m from the hole, with an angular velocity of `"2 rad s"^(-1)`. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.2 m. Considering the block to be point mass, calculate the new angular velocity `("in rad s"^(-1))`

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