1. Limited time only! Sign up for a free 30min personal 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!

Physics football tackle problem

  1. Sep 21, 2009 #1
    1. The problem statement, all variables and given/known data
    a running back with a mass of 80kg and a speed of 8m/s collides with and is held by a 120kg defensive tackle going in the opposite direction how fast must the tackle be going before the collision for their speed afterward to be zero?


    2. Relevant equations

    Linear momentum = mv
    total mv before equals total mv after

    3. The attempt at a solution
    i was thinking that I would take mv=80x8 =640 divided by 120 =5.3m/s
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Sep 21, 2009 #2

    rock.freak667

    User Avatar
    Homework Helper

    yes that is correct

    m1v1-m2v2=0 so v2=m1v1/m2
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Physics football tackle problem
  1. Football Problem (Replies: 3)

  2. Football tackle force (Replies: 1)

Loading...