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: Kinematics: projectiles question

  1. May 7, 2006 #1
    Given the context of this question being quite large and my main problem being the solving i won't bother with diagrams but anyway

    the kinematics conditons are

    Such that i have 10 = (Vcos15)t + 0.5gt^2
    1.9 = (Vsin15)t + 0.5gt^2

    Can anyone please show me the steps for solving this simultaneously for V,

    Cheers.
     
  2. jcsd
  3. May 7, 2006 #2

    Fermat

    User Avatar
    Homework Helper

    Write the 1st eqn as:Vcos15 = whatever
    Write the 2nd eqn as :Vsin15 = whichever

    Divide the 1st eqn by the 2nd eqn
    Solve for t
    substitute for t into the 1st or 2nd eqn
    Solve for V
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook