Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Final speed of two billiard balls

  1. Oct 25, 2007 #1
    Both have mass of .5 kg and speed of 2.8 m/s; collide completely inelastically

    Do I use the conservation of momentum formula? v2= m1/m1 + m2 * v1?

    Ugh.
     
  2. jcsd
  3. Oct 25, 2007 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Use conservation of momentum. (Not sure about that formula, though.) Why not post the exact problem?
     
  4. Oct 25, 2007 #3
    A billiard ball with mass .5 kg has a speed of 2.8 m/s and collides completely inelastically with a ball of same mass.

    Find the final speed of two balls.


    What formula do you know for the conservation of momentum?
    Thanks!
     
  5. Oct 25, 2007 #4

    Doc Al

    User Avatar

    Staff: Mentor

    The formula you quoted will work fine for this problem.
     
  6. Oct 25, 2007 #5
    yaaay! ok. that's a lot!!!
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook