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Projectile motion

  1. Mar 16, 2010 #1
    1. The problem statement, all variables and given/known data
    A cannon ball is fired with speed v0 at an angle phi above the horizontal. The launch point is at height h above the ground. Find the time to hit the ground, and the magnitude of the velocity when the ball hits the ground (in terms of v0, g, h, [tex]\phi[/tex])


    2. Relevant equations
    y=v0sin([tex]\phi[/tex])t - 1/2gt^2
    vy=v0sin([tex]\phi[/tex]) - gt


    3. The attempt at a solution
    how do i account for initial height?
     
  2. jcsd
  3. Mar 16, 2010 #2

    rock.freak667

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    Homework Helper

    y=y0+v0sin(φ)t - 1/2gt2
     
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