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: Work done by force

  1. Dec 13, 2013 #1
    1. The problem statement, all variables and given/known data

    A particle moves only along the x-axis, and is subject to a force towards the origin of magnitude kx^3. if the particle moves from x1 to x2 how much work does this force do on it? (consider the case x1<x2)

    2. Relevant equations


    3. The attempt at a solution

  2. jcsd
  3. Dec 13, 2013 #2
    I just noticed that the force would change as the particle moved along the x-axis. Taking the anti-derivative of kx^3 from x1 to x2 I got (kx2^4)/4 - (kx1^4)/4 = k/4 (x2^4-x1^4)
  4. Dec 13, 2013 #3
    Looking good to me!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted