1. Not finding help here? Sign up for a free 30min 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!

Finding the initial velocity of a vector

  1. Nov 1, 2012 #1
    1. The problem statement, all variables and given/known data
    An object that is thrown covers a distance of 8.59 m. If the angle at which it is thrown is 23 degrees, what is its initial velocity?


    2. Relevant equations
    5 kinematic equations:
    a = (v2-v1)/t
    d=0.5(v1+v2)t
    d=v1t+0.5at^2
    d=v2t-0.5at^2
    v2^2=v1^2+2ad
    Equation for uniform motion:
    v=d/t


    I have no idea how to solve this :cry: Any help is appreciated Thanks :smile:
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 1, 2012 #2

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Horizontal motion is independent of vertical motion.
     
  4. Nov 1, 2012 #3
    What do you mean? :confused:
     
  5. Nov 2, 2012 #4
    Firstly you can break it into its horizontal and vertical vectors, and you know in the horizontal direction there is no force acting on it therefore its speed will stay constant.

    In the vertical direction you may find how long the ball stays in the air for.

    In summary find how long the ball was in the air for.

    calculate the initial horizontal speed using V=d/t you now have t and d
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Finding the initial velocity of a vector
Loading...