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Potential Energy Function Given E sub-t

  1. Nov 11, 2008 #1
    1. The problem statement, all variables and given/known data
    two atoms - larger (M) at rest smaller (m) at a straight line distance r where m < < M. Figure shows U(r) for various positions of the lighter atom.<p>
    1. . \
    . . . | E1 --------<br>
    0 - . \<br>
    . . . . \ . . . . . . . ____<br>
    -1. . . . \ E2--_/----<br>
    . . . . . . \_ _/<br>
    --.1 -- .2 --- .3 <p>
    For E1 = 1.0 x 10-19J and r = 0.30 (crosses E2 line) find the potential energy, the kenetic energy, and the force (magnitude and direction) acting on the atom.<p>
    U(r) is verticle at 10-19J<p>
    R in nm is horizontal

    2. Relevant equations
    F = -dU/Dr<p>
    KE = mV2/2<p>


    3. The attempt at a solution
    There were two other questions with this to describe the motion at ET >0 and <0, but I'm pretty sure I got them.
    Also I'm pretty sure the force (direction) is towards the atom at rest, but I'm not sure what to do to get KE, and should I estimate the value of the potential energy from my graph which is better, or estimate the slope. I just need a nudge in the right direction to get going on this.<p>
    Thanks in advance
     
  2. jcsd
  3. Nov 12, 2008 #2
    still need help on this one
     
  4. Nov 13, 2008 #3
    Is NO ONE able to provide help with this?!?
     
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