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!

Biomechanics Static Forces on handle of locked door

  1. Sep 15, 2009 #1
    1. The problem statement, all variables and given/known data
    A person with a mass of 80kg pulls horizontally on the handle of a door which is locked. At that
    instant, the ground reaction force has a magnitude of 810N. What is the force applied to the door?
    (200 N)

    2. Relevant equations

    3. The attempt at a solution
    It seems like there is something missing in this question and does the persons mass really matter? I am really confused on this one.
  2. jcsd
  3. Sep 15, 2009 #2


    User Avatar

    Staff: Mentor

    Welcome to the PF. Start by drawing a free body diagram (FBD) of the person, and list all of the forces that are acting on him/her. Be sure to include all horizontal and vertical forces. Then use the fact that the person is not moving, which implies that the sum of the forces is....?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Biomechanics Static Forces Date
How to calculate these values in biomechanics? Feb 6, 2018
Biomechanics physics Dec 20, 2016
Conservation of Angular Momentum Dec 7, 2016
Biomechanics Static Forces sled on snowy surface Sep 15, 2009