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Homework Help: Final velocities of two blocks

  1. Oct 31, 2012 #1
    Greetings Fellow Physics lovers!

    I was wondering if somebody could please check my work on this problem.

    A 5 kg block traveling at 10 m/s collides into a stationary 2 kg block. Find the final velocities of the two blocks after the elastic collision.

    V1f=(m1-m2)/(m1+m2) (V1i)

    V2f= (2m1)/(m1+m2) (v1i)

    V1f=(5-2)((5+2) (10) = 4.28 m/s

    V2f=2(5)/(7) (10)= 14.29 m/s

    Thanks for your help!
  2. jcsd
  3. Oct 31, 2012 #2


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    Homework Helper

    It is correct, except the typing error of "(" instead of "/".

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