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!

Average magnitude of force during a 0.4 second impact

  1. Nov 17, 2012 #1
    1. The problem statement, all variables and given/known data

    A 40kg branch falls 5.5m and lands on a roof. The roof withstood the the impact.

    2. Relevant equations

    If the impact time was 0.4 second calculate the magnitude of the average force exerted on the roof during the impact.

    3. The attempt at a solution

    F=ma doesn't seem right because it's in free fall though.
    P=mv ≈ 415
    415/0.4=1037.5N?

    Is this right?
     
    Last edited: Nov 17, 2012
  2. jcsd
  3. Nov 18, 2012 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    That is correct !
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Average magnitude of force during a 0.4 second impact
Loading...