1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Energy problem

  1. Apr 19, 2010 #1
    1. The problem statement, all variables and given/known data
    Stone with weight Q=20N falls from height h=5m and goes delta l =5 cm under surface.What is the avarage force of hit ?

    2. Relevant equations

    3. The attempt at a solution

    is this correct way to solve it

    mgh=F*delta l

    F=mgh/delta l=(20*9.81*5)/5 =196.2N

    correct ?
  2. jcsd
  3. Apr 19, 2010 #2


    User Avatar
    Science Advisor
    Gold Member

    Looks good to me.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook