1. Limited time only! Sign up for a free 30min personal 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!

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?

  4. Dec 8, 2014 #3


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    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?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted