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Homework Help: Maximum Height of Projectile Using Cons. of Energy

  1. Sep 26, 2008 #1
    1. The problem statement, all variables and given/known data

    A projectile is launched with a speed of 45 m/s at an angle of 56° above the horizontal. Use conservation of energy to find the maximum height reached by the projectile during its flight.


    2. Relevant equations
    PE=KE
    mgh=1/2mv^2
    gh=1/2v^2
    h=.5v^2/g


    3. The attempt at a solution
    I thought in this equation that the angle wouldn't matter, but I know I'm wrong. I thought you could just plug it the numbers to the manipulated formula h=.5v^2/g. Please help! thanks
     
  2. jcsd
  3. Sep 26, 2008 #2

    hage567

    User Avatar
    Homework Helper

    Yes the angle matters. You need to consider the vertical component of the initial velocity.
     
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