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Homework Help: Newtons third law

  1. Dec 7, 2014 #1
    1. The problem statement, all variables and given/known data Find the normal force exerted on a 68.2 kg blacksmith's anvil by the level block of wood that is supporting it.


    2. Relevant equations f=ma Ff=uFn


    3. The attempt at a solution I have tried to find all the forces acting on the anvil while using its mass but im not correct for some reason. I did 9.8x68.2 and that is all i know what to do right now
     
  2. jcsd
  3. Dec 7, 2014 #2
    Do you have a significant figures issue?

    Chet
     
  4. Dec 8, 2014 #3

    CWatters

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    That appears to be the right approach.

    Did they say to assume g = 10 m/s/s rather than 9.8 m/s/s?

    Did they say to assume up or down is positive?
     
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