1. Not finding help here? Sign up for a free 30min 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!

Kinetic energy help

  1. Oct 9, 2004 #1
    Can someone help me with this:

    For a completely inelastic collision, the fractional change in kinetic energy can be found as a function of the masses of the projectile and target carts only. Show that the fractional change in kinetic energy is given by:

    [KE(final) - KE(initial)] / KE(initial) = -M / (m + M)

    I know that KE = 1/2 mvsquared
    but I can't seem to cancel v out to get -M / (m + M)
  2. jcsd
  3. Oct 9, 2004 #2


    User Avatar
    Science Advisor
    Homework Helper

    Don't forget that momentum is conserved in the collision!
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Kinetic energy help
  1. Kinetic energy help (Replies: 4)

  2. Kinetic energy help (Replies: 1)

  3. Kinetic energy, help ? (Replies: 3)