Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Breaking Boards

  1. Oct 21, 2007 #1
    1. The problem statement, all variables and given/known data
    For an extra credit assignment I was given two things I needed to find:
    1) The acceleration of an arm when it is breaking a board (like in karate)
    2) How physics relates to the breaking of the board

    2. Relevant equations
    This is my first year in high school physics and we just finished our second unit. The only equations I have learned and most likely relate to this are...

    d=vit + 1/2at(squared)
    vf(squared)=vi(squared) + 2ad
    vf=vi + at

    3. The attempt at a solution
    Because I was given no variables I'm not really sure how to approach this problem. With the equations I do know I'm not really sure what I would put in for time or distance without it being given. Any help would be greatly appreciated. Thanks!
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted