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A uniform rod of mass $m$ and length $l$ pivoted at point $P$ is initially at rest. A blob of clay putty of the same mass $m$ is moving with speed $v$ towards one end of the rod, as shown above. The putty strikes and sticks to that end.

What is the magnitude of the angular velocity of the rod-putty system immediately after the collision?

A

$3v/4l$

B

$4v/3l$

C

$v/l$

D

$v/2l$

E

$v/3l$

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