The uniform rod (length 0.60 m, mass 1.0 kg) in Figure rotates in the plane of the figure about an axis through one end, with a rotational inertia of 0.12 kg ? m2. As the rod swings through its lowest position, it collides with a 0.20 kg putty wad that sticks to the end of the rod. If the rod's angular speed just before collision is 2.4 rad/s, what is the angular speed of the rod-putty system immediately after collision?

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Rotation axis Rod