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A particle of mass ‘m’ moving with velocity ‘u’ collides with a stationary particle of mass ‘3m’. After collision, they stick together and continue to move together with velocity

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$\frac{u}{3}$

$\frac{u}{4}$

$u$

$\frac{u}{2}$

answer is B.

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Detailed Solution

$M u = (m + 3 m) V$

$V = \frac{u}{4}$

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