A body of mass $4\  kg$ collides head-on elastically with another body of mass $2\  kg$ kept at rest in free space. Time of collision is $0.02\  sec$ and average impulse force acted on each bodies is $100\  N$. Find the velocity of the $2\  kg$ body after the impact

  • A

    $0$

  • B

    $1$

  • C

    $2$

  • D

    $3$

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