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!

Kinetic Friction on inclined plane problem

  1. Oct 18, 2004 #1
    Been trying to comprehend this one for a few hours:

    The coefficient of kinetic friction between a block and an inclined plane is 0.20 and the angle is 60 degrees.

    What is magnitude of a? The book says 7.5 m / s^2
    How do I figure this with no speeds or distances or even a mass?
  2. jcsd
  3. Oct 18, 2004 #2
    you gotta do your free body diagrams!! those stupid things.... remember? the sum of all forces = ma unless the velocity is constant. do one for the x side and one for the y side, incorporate your co. of kinetic friction and the angle (probably cos60 and sin60 from mg)..... help any? i have a lot of trouble with these, too
  4. Oct 18, 2004 #3


    User Avatar
    Homework Helper

    Like doxi said use a freebody diagram then

    Apply Newton's 2nd Law

    [tex] \sum_{i=1}^{n} \vec{F}_{i} = m \vec{a} [/tex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Kinetic Friction on inclined plane problem