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!

Ballistics Pendulum

  1. Oct 14, 2008 #1
    1. The problem statement, all variables and given/known data

    A 23 g bullet traveling 235 m/s penetrates a 3.8 kg block of wood and emerges cleanly at 195 m/s.

    If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?

    2. Relevant equations

    (1) mv= (m+M)v'

    momentum before= momentum after

    (2) 1/2(m+M)v'^2 = (m+M)gh
    3. The attempt at a solution

    I attempted to solvethis using these two equations and I received an answer for 1.14 m/s and 230 m/s. I am having a lot of trouble even determining how to start this problem. I dont want a quick easy answer but I would like help working through it! Thank You!
  2. jcsd
  3. Oct 15, 2008 #2


    User Avatar
    Science Advisor
    Homework Helper

    Hi 12boone! :smile:

    However did you use equation (2)? :confused:

    Equation (1) should be enough.

    Try again! :smile:
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Ballistics Pendulum
  1. Ballistic Pendulum (Replies: 0)

  2. Ballistic pendulum (Replies: 2)

  3. Ballistic Pendulum (Replies: 1)

  4. Ballistic Pendulum (Replies: 8)

  5. The Ballistic Pendulum (Replies: 2)