A smooth tube of certain mass is rotated in a gravity-free space and released. The two balls sho...

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A smooth tube of certain mass is rotated in a gravity-free space and released. The two balls shown in figure move
\( \mathrm{P} \) towards the ends of the tube. For the whole system, which

W of the following quantities is not conserved.
(1) Angular momentum
(2) Linear momentum
(3) Kinetic energy
(4) Angular speed
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