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: Potential energy

  1. Feb 24, 2004 #1
    i need help for this problem.

    A single conservative force acting on a particle varies as:


    where A=48N/m and B=93N/m^2 and x is in meters.
    Find the change in potential energy as the particle moves from x0=3.2m to x1=2.8m. Answer in units of J.
    Find the change in kinetic energy of the particle between the same two points. Answer in units of J.

    I tried this problem and I thought it was zero. However, the answer is not zero. I also thought the kinetic energy was -277.696. Can anybody verify this answer? Thanks.
  2. jcsd
  3. Feb 24, 2004 #2


    User Avatar
    Science Advisor
    Gold Member

    Try this:
    [tex] \Delta U = -\int_{x_o}^{x_f} F(x)\cdot dx [/tex]
    Last edited: Feb 24, 2004
  4. Feb 24, 2004 #3
    Thanks alot

    It worked. Thanks.
  5. Feb 24, 2004 #4
    cool thx :)
    Last edited: Feb 24, 2004
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook