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 of box down a ramp

  1. Feb 26, 2005 #1
    A box slides down a ramp inclined at 41 degrees horizonontal with an acceleration of 1.4 m/s^2. The acceleration of gravity is 9.8 m/s^2. Determine the coefficient of kinetic friction between the box and the ramp.

    no ideas need any advice
     
  2. jcsd
  3. Feb 27, 2005 #2

    xanthym

    User Avatar
    Science Advisor

    {Net Force On Box Parallel To Ramp} = {Gravity Parallel Component} - {Friction} =
    = m*g*sin(41 deg) - K*m*g*cos(41 deg)
    = m*g*{sin(41 deg) - K*cos(41 deg)}
    = m*a

    a = g*{sin(41 deg) - K*cos(41 deg)}
    (1.4) = (9.8){(0.6561) - K*(0.7547)}
    K = {(1.4/9.8) - 0.6561}/(-0.7547)
    K = (0.6801)


    ~~
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Kinetic friction of box down a ramp
Loading...