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: Hmm, I know in a vacuum that with projectile motion

  1. May 10, 2005 #1
    shooting the projectile at 45 degrees will yield the greatest distance, and 30 and 60 degrees should go the same distance, but if you add in an air-friction force of -kv^2 (where k is .05 and v is the instant speed)is it possible for that to be otherwise?

    'cuz the program I just wrote says it is, and I'm thinking I might've screwed up the program. If that's the case, anyone here good at FORTRAN?
     
  2. jcsd
  3. May 10, 2005 #2

    James R

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    There's no reason to suppose that, with air resistance, a projectile fired at 30 or 60 degrees will go the same distance.
     
  4. May 11, 2005 #3

    OlderDan

    User Avatar
    Science Advisor
    Homework Helper

    or that one fired at 45 degrees will have the greatest distance.

    I used to know some FORTRAN, but even that has probably changed since I last did any. How are you approaching the problem?
     
  5. May 11, 2005 #4
    If you assume a uniform air field then the magnitudes of a 30 and 60 degree launch will decrease the same.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook