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Q19: The uniform rod of mass M- 2 kg and length of L- 8 cm is free to rotate about a horizontal axis shown in the figure. An object of mass 0.4 kg moving with 24 m/s strikes and then sticks to the initially stationary rod as shown. If rotational inertia of the rod according to its center of mass is given as Icmdisk M, find the a) rotational inertia of the system before and after collision, b) angular speed of the rod just after the collision Answer: a) 1.87×103 kgm. (before) L/4 3L/4 3.31 × 10-3 kg1㎡ (after) b 105.7 rad/s Rotation 37° axis 24 m/s

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2 12 d distamca of centr of mass the asio of otationL So 4 oheu 12 33110-> conservahon ana ular moumenhum ocout axis of tobef

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