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!

Projectile motion cannon shot

  1. Apr 27, 2016 #1
    1. The problem statement, all variables and given/known data
    Warren weights 70 kg and is shot out of a cannon at 25 degrees above the horizontal. the cannon barrel tip is 1.34m above the ground and the cannon has a mass of 203kg.
    What is Warren's initial launch velocity?


    2. Relevant equations
    I don't even know


    3. The attempt at a solution
    I think that this problem is missing some info, or i'm really bad at physics
     
    Last edited by a moderator: Apr 27, 2016
  2. jcsd
  3. Apr 27, 2016 #2

    ProfuselyQuarky

    User Avatar
    Gold Member
    2016 Award

    Doesn't your textbook give you a list of equations for whatever you're learning?
     
  4. Apr 27, 2016 #3
    We don't go by the textbook, she teaches us with labs and stuff, there are several equations but none of them fit
     
  5. Apr 27, 2016 #4
    Also this is review for my final and we learned it a while back, i'm taking a practice test and need to get this question right
     
  6. Apr 27, 2016 #5

    ProfuselyQuarky

    User Avatar
    Gold Member
    2016 Award

    Post the equations that you do know.
     
  7. Apr 27, 2016 #6
    d = vi•t + 0.5*a*t2
    vf = vi + a•t
    vf2 = vi2 + 2*a•d
    that's about it, i can't find a lot of formulas pertaining to initial launch velocity
     
    Last edited by a moderator: Apr 27, 2016
  8. Apr 27, 2016 #7

    SteamKing

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper

    What happens to Warren after he leaves the cannon? Without knowing that, you can't determine what Warren's initial launch velocity was.
     
  9. Apr 27, 2016 #8

    ProfuselyQuarky

    User Avatar
    Gold Member
    2016 Award

    What numbers in your problem matches the variables in those equations?
     
  10. Apr 27, 2016 #9

    mfb

    User Avatar
    2016 Award

    Staff: Mentor

    If that is the complete problem statement, the problem does not make sense.
    Is there something else given? Maybe in a second part, or in a sketch of the problem?
     
  11. Apr 28, 2016 #10
    Guys, I went to my professor and she said that it was missing the range, sorry for sounding really confusing.
     
  12. Apr 28, 2016 #11
    And thanks for trying to help me, i did get an A+ on the homework, which is the best possible outcome
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Projectile motion cannon shot
Loading...