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!

Momentum question REALLY NEED HELP

  1. Sep 24, 2007 #1
    momentum question...REALLY NEED HELP!!

    1. The problem statement, all variables and given/known data
    A .22 rifle bullet, traveling at 350 m/s, strikes a block of soft wood, which it penetrates to a depth of 0.130m . The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.80g. Assume a constant retarding force.

    ??-How much time is required for the bullet to stop? (in seconds)

    ??-What force, in newtons, does the wood exert on the bullet?


    2. Relevant equations



    3. The attempt at a solution
    well honestly, i have no idea where to begin.... can some one please help me
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 25, 2007 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Kinematics, think x(t)=x0+v0*t+(1/2)*a*t^2. What acceleration is required to stop the bullet? Once you have a, what force is needed to stop the bullet? Now think of Newton's third law.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Momentum question REALLY NEED HELP
Loading...