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Croquet Ball Question

  1. Mar 23, 2007 #1
    1. The problem statement, all variables and given/known data
    A 0.180 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball.(a) What is the mass of the second ball?(b) What fraction of the original kinetic energy (KE/KE) gets transferred to the second ball?

    2. Relevant equations


    3. The attempt at a solution
    I solved for "v2a" using equation b and got mb2.77777va I then plugged this back into equation a and got (.5)(.18)(va)^2=(.5)(.18)((mb)(2.77777)(va))^2+(.5)(mb)((.5)(va))^2. If I've done this correctly I still don't know how to solve it correctly to find the mass of "ball b"
  2. jcsd
  3. Mar 23, 2007 #2


    User Avatar
    Gold Member

    You can factorize m_b from the right-hand side of your final equation. I haven't checked if it's correct but your method obviously is.
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