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A horizontal vinyl record of radius0.14m rotates about a vertical axis through its center with an angular speed of 4.7 rad/s. The rotational inertia of the record about its axis of rotation is 5.0multiplied by10-4kg·m2. A wad of putty of mass0.045kg drops vertically onto the record from above and sticks to the edge of the record. What is the angular speed of the record immediately after the putty sticks to it?

rad/s

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