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

Quick Conceptual Question about Energy

  1. Apr 9, 2008 #1
    1. The problem statement, all variables and given/known data
    A system loses 400 J of potential energy. In the process it does 400 J of work on the environment and the thermal energy increases by 100 J. Show this process on an energy bar chart.


    2. Relevant equations
    Ui + Ki + Wext = Uf + Kf + change in thermal energy


    3. The attempt at a solution
    I drew a bar with value +400 J for Ui, +100 J for Ki, and -400 J for Wext. Then I drew a bar of +100 J for change in thermal energy. The part I'm not sure about is the +100 J for Ki since the problem doesn't say anything about losing kinetic energy. But that was only way I could think to make the equation balance.

    Any thoughts would be greatly appreciated.
     
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Similar Discussions: Quick Conceptual Question about Energy
  1. Quick rocket question (Replies: 0)

Loading...