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!

Problem on One-Dimentional Motion: Bullet going through a board.

  1. Sep 25, 2008 #1
    An indestructible bullet 2.00cm long is fired straight through a board that is 10.0cm thick. The bullet strikes the board with a speed of 420 m/s and emerges with a speed of 280m/s.
    (a) What is the average acceleration of the bullet through the board?
    (b) What is the total time that the bullet is in contact with the board?
    (c) What thickness of board (calculated to 0.1cm) would it take to stop the bullet, assuming that the acceleration through all boards is the same?

    We can use these equasions (v0=initial velocity, D=displacement):

    v = v0 + at
    D = v0t + (1/2)at2
    v2 = v02 + 2aD
    D = (1/2)(V0+V)t
    D = vt - (1/2)at2



    I have found that the answer to part (a) is equal to -490,000m/s2,
    but I cannot figure out how to do parts (b) and (c).
    Please help?!
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you help with the solution or looking for help too?
Draft saved Draft deleted



Similar Discussions: Problem on One-Dimentional Motion: Bullet going through a board.
  1. Motion & Beams Problem (Replies: 0)

  2. Breaking Boards (Replies: 0)

Loading...