1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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: Speed after collision

  1. Sep 20, 2008 #1
    1. The problem statement, all variables and given/known data
    A bullet of mass m traveling horizontally at a very high speed v embeds itself in a block of mass M that is sitting at rest on a nearly frictionless surface. What is the speed of the block after the bullet embeds itself in the block?

    2. Relevant equations

    3. The attempt at a solution
    momentum (p) of the bullet = mv.
    But I don't know how to figure out the speed of the block..since momentum is conserved, would it just be v=p/m?
  2. jcsd
  3. Sep 20, 2008 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Momentum is conserved. What would be the momentum of the "block+bullet" after the collision? (Write it mathematically.)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook