1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Force, acceleration,friction

  1. Aug 4, 2009 #1
    1. The problem statement, all variables and given/known data

    A sled and cargo weighing 490 N is towed by a tractor over a horizontal field where the coefficient of sliding friction is 0.400. If the tractor exerts a force of 300 N, what is the acceleration of the sled?

    2. Relevant equations

    3. The attempt at a solution
    i Tried changing the 490N to Kg by dividing it by 9.81. that gave me 49.95. i then multiplied that by 0.400. then i divided that final number from 300 N.
  2. jcsd
  3. Aug 5, 2009 #2


    User Avatar
    Homework Helper

    490 N is the normal reaction. So the frictional force fk= μkN.
    Acceleration = (F - fk)/m
  4. Aug 5, 2009 #3
    O thank you so much :)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook