1. Not finding help here? Sign up for a free 30min 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!

Dynamics of block with friction how to set up?

  1. Oct 7, 2007 #1
    1. The problem statement, all variables and given/known data
    a 2.0 kg wood box slides down a vertical wood wall while you push on it at a 45 degree angle. what magnitude of foce should you apply to cause the box to slide down at a constant speed? I know that Mk = .2 (wood on wood)

    2. Relevant equations

    3. The attempt at a solution

    I tried to solve it with setting the forces in the y direction. I keep getting it wrong. i said Fy=0=Fasin[tex]\vartheta[/tex] - 19.6 N then solved and got Fa = 27.71 N. however the answer is Fa = 23.1 N
  2. jcsd
  3. Oct 7, 2007 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    You have to look at all forces in the y direction. You missed one. You're going to have to look for all forces in the x direction as well.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Dynamics of block with friction how to set up?