Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Coefficient of Friction

  1. Apr 5, 2008 #1
    1. The problem statement, all variables and given/known data

    I just did a lab at school dealing with coefficient of friction for an object on an incline. After all my calculations done, my answer is negative for a cart sliding down, dealing with kinetic friction.

    2. Relevant equations



    3. The attempt at a solution

    I have checked all my calculations and have found nothing wrong.
     
  2. jcsd
  3. Apr 5, 2008 #2

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Well how can we help unless you show us your calcs??
     
  4. Apr 5, 2008 #3
    My question is whether the coefficient of friction can be negative?
     
  5. Apr 5, 2008 #4

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Oh, no.
     
  6. Apr 5, 2008 #5
    Did you turn the ramp around so the angle was in the 2nd quadrant?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook