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!

Does Newtons 3rd law corespond with pressure?

  1. May 19, 2010 #1
    If I were to take a standard sharp led pencil and push it on my desk, the tip of pencil will feel the same force as the force exerted on the desk, but what about the pressure?

    Since pressure is defined as:

    P = F / A

    The surface area of the tip of the sharp pencil is far smaller than the surface area of the desk, so does that mean that the pressures will be different? Or are they the same due to a resultant pressure?


    Thanks.
     
  2. jcsd
  3. May 19, 2010 #2

    Borek

    User Avatar

    Staff: Mentor

    Only contact surface counts, and it is identical for both objects.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Does Newtons 3rd law corespond with pressure?
  1. Newtons 3rd law (Replies: 4)

  2. Newton's 3rd Law (Replies: 17)

Loading...