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A horizontal vinyl record of mass .10kg and radius .10m rotates freely about a vertical axis through its center with an angular speed of 4.7 rad/sec . The rotational inertia of the record about its axis of rotation is 5 X 10-4 kg-m2 . A wad of wet putty of mass 0.020 kg drops vertically onto the record from the above and sticks to the edge of the record. What is the angular speed of the record immediately after the putty sticks to it.

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