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Homework Help: Projectile Shot Horizontally

  1. Sep 30, 2009 #1
    1. The problem statement, all variables and given/known data
    A ball is shot horizontally at a speed of 10 m/s from a height of 2 meters. How long is the ball in the air and how far horizontally does it travel before it hits the ground.

    2. Relevant equations
    V2 Equation

    3. The attempt at a solution
    I am assuming I need to find both the X and Y components right? I know that the final Y velocity must be 0 because it stops at the top of its trajectory. What is throwing me off is the 2 meters it starts at as well as how I am going to get the horizontal distance.
  2. jcsd
  3. Sep 30, 2009 #2


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    Homework Helper

    [tex]s=s_o +ut-\frac{1}{2}gt^2[/tex]

    where s=displacement and s0= initial displacement.

    So considering vertically, what is s0? and you want to find the 't' for which s=0.
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