Two particles A and B initially at rest, move towards each other under mutual force of attractio....

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Two particles A and B initially at rest, move towards each other under mutual force of attraction. At instant when the speed of \( \mathrm{A} \) is \( \mathrm{V} \) and the speed of \( \mathrm{B} \) is \( 2 \mathrm{~V} \),
\( \mathrm{P} \)
the speed of the centre of mass of the system is
(1) \( 3 \mathrm{~V} \)
(2) \( \mathrm{V} \)
(3) \( 1.5 \mathrm{~V} \)
(4) zero


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