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Homework Help: 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.
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