A $500\mathrm{.}0g$ bird is flying horizontally at $2\mathrm{.}50\frac{m}{s},$ not paying much attention, when it suddenly flies into a stationary vertical bar, hitting it $25\mathrm{.}0cm$ below the top $($Figure $1).$ The bar is uniform, $0\mathrm{.}800m$ long, has a mass of $1\mathrm{.}20kgkg,$ and is hinged at its base. The collision stuns the bird so that it just drops to the ground afterward $($but soon recovers to fly happily away$).$

Part A

What is the angular velocity of the bar just after it is hit by the bird?

Express your answer in radians per second.

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Part B

What is the angular velocity of the bar just as it reaches the ground?

Express your answer in radians per second.

$\sqrt[]{}AhO?$

${}_2=ra\frac{d}{s}$

$?$

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