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JEE Main 2002 (AIEEE) · Motion of Centre of Mass

Motion of Centre of Mass question from JEE Main 2002 (AIEEE)

Q14JEE Main 2002 · AIEEEEasy

Motion of Centre of Mass

Two identical particles move towards each other with velocity $2v$ and $v$ respectively. The velocity of center of mass is

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Answer: (c)

Take the $2v$ direction as positive; the other particle has $-v$ .
$v_{cm} = \frac{m(2v) + m(-v)}{2m} = \frac{v}{2}$
So the answer is (c) $v/2$ .

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