Any Physics genius' on this board?

Discussion in 'Off-Topic' started by cyismydog, Sep 23, 2009.

  1. cyismydog

    cyismydog Well-Known Member

    Apr 13, 2006
    6,354
    212
    63
    I need help with a problem for my AP online class, my teacher is a bigger idiot than Pacman Jones, and can't teach to save her life:
    Any help would be appreciated. You don't necessarily have to do it for me, but just show me which equations to use, and which variables mean what.
    Thanks in advance, I really appreciate it.
     
  2. tim_redd

    tim_redd Well-Known Member

    Mar 29, 2006
    8,363
    360
    83
    Ankeny
    What planet is this cannon fired from?
     
  3. cyismydog

    cyismydog Well-Known Member

    Apr 13, 2006
    6,354
    212
    63
    Earth.
     
  4. 3TrueFans

    3TrueFans Well-Known Member

    Sep 10, 2009
    30,941
    1,255
    113
    Ames
    European or African Cannonball?
     
    • Like Like x 2
  5. CycoCyclone

    CycoCyclone Well-Known Member

    Apr 6, 2009
    5,023
    128
    63
    Male
    Business Analyst
    Urbandale
    Are we taking gravity into account?
     
  6. IcSyU

    IcSyU Well-Known Member

    Nov 27, 2007
    24,889
    1,041
    113
    Rochester, MN
    How hard is the ground? :wink: If it's hard enough, it's gonna be 0. :biggrin:
     
  7. sodakjoe

    sodakjoe Well-Known Member

    Sep 15, 2006
    2,799
    119
    63
    Ames via Sioux Falls, SD
    Equation for constant acceleration

    at^2 + v0t + s = 0, where:

    a = acceleration
    v0 = initial velocity of the object
    s = initial position of the object
     
  8. Stewo

    Stewo Well-Known Member

    Oct 29, 2008
    8,222
    392
    83
    Male
    Commodity buyer
    Iowa
    You know I don't speak Spanish, CIMD.
     
  9. sodakjoe

    sodakjoe Well-Known Member

    Sep 15, 2006
    2,799
    119
    63
    Ames via Sioux Falls, SD
    Split your velocity into two components: an x component and a y component, and try to work it from there.
     
  10. keepngoal

    keepngoal Jobless Jerk
    Staff Member

    Jun 20, 2006
    23,050
    579
    113
    Has resistance been taken out of the problem?
     
  11. cyismydog

    cyismydog Well-Known Member

    Apr 13, 2006
    6,354
    212
    63
    Yes.
     
  12. pyrocyz

    pyrocyz Well-Known Member

    Jun 2, 2006
    2,839
    124
    63
    Ames
    Things that need to be taken into account include terminal velocity (you would need the mass of the cannon ball), gravity in general (the cannon ball may be traveling almost straight down by the time it gets to the ground)

    Personally I would look into projectile motion equations. All projectiles proceed on a curve, you are just starting 60% of the way through the curve.
     
  13. DaddyMac

    DaddyMac Well-Known Member

    Oct 18, 2006
    14,352
    456
    83
    #13 DaddyMac, Sep 23, 2009
    Last edited: Sep 23, 2009
    Clearly a French cannonball.


    Next question is how did it get to England?
     
  14. pyrocyz

    pyrocyz Well-Known Member

    Jun 2, 2006
    2,839
    124
    63
    Ames
    I'd listen to sodakjoe...he knows his stuff
     
  15. cyfanatic

    cyfanatic Well-Known Member

    Oct 18, 2006
    4,204
    77
    48
    Cedar Rapids, Iowa
    I have nothing to offer this thread in terms of an answer...but what does it say about me that I am curious to see what the answer is? I keep hitting refresh to see if someone has offered an answer...
     
  16. cyismydog

    cyismydog Well-Known Member

    Apr 13, 2006
    6,354
    212
    63
    That's what I'm trying to do, use the projectile motion equation, but once i plugged all the numbers in, the computer said the answer was wrong, but you get three shots at each problem.
     
  17. jdoggivjc

    jdoggivjc Well-Known Member

    Sep 27, 2006
    40,470
    1,252
    113
    Sterling Heights, MI
    He's no physics expert - he stayed at a Holiday Inn Express last night...
     
  18. sodakjoe

    sodakjoe Well-Known Member

    Sep 15, 2006
    2,799
    119
    63
    Ames via Sioux Falls, SD
    Haha. I did not stay at a HIE last night, and I am far from an "expert".
     
  19. 3TrueFans

    3TrueFans Well-Known Member

    Sep 10, 2009
    30,941
    1,255
    113
    Ames
    Just look at his avatar. Is that not a face you would trust with your physics questions?
     
  20. tim_redd

    tim_redd Well-Known Member

    Mar 29, 2006
    8,363
    360
    83
    Ankeny
    He's smart to wear a helmet to protect his brain from zombies.
     

Share This Page