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!

Trajectory of an exploding shell

  1. Mar 14, 2008 #1
    A 36-kg shell is fired from a gun with a muzzle velocity 185 m/s at 59 degrees above the horizontal. At the top of the trajectory, the shell explodes into two fragments of equal mass. One fragment, whose speed immediately after the explosion is zero, falls vertically. What is the horizontal speed of the other fragment?

    Hint: Use conservation of linear momentum at the point of explosion.

    My gut approach to this problem was that I could use the angle to find the vertical and horizontal components of velocity. If we assume no friction, the horizontal component of acceleration should remain constant. It is apparently the wrong answer. I don't really understand how to use conservation of linear momentum here? Any help is much appreciated! Thanks!
     
    Last edited: Mar 14, 2008
  2. jcsd
  3. Mar 15, 2008 #2

    Hootenanny

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Perhaps if you posted your working we could help you along. Further, try to use the hint regarding conservation of momentum rather than velocities. An important point here is that the shell splits into to pieces and therefore you have to take into account the masses of the pieces, not just the velocities.
     
    Last edited: Mar 15, 2008
  4. Mar 15, 2008 #3

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Bizznaatch! Welcome to PF! :smile:

    (btw, you mean the horizontal component of velocity should remain constant - the horizontal acceleration, of course, is zero)

    Hint: What is the direction of the velocity at the top of the trajectory?

    So what is its speed there? :smile:
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Trajectory of an exploding shell
  1. Exploding Shell (Replies: 1)

Loading...