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Finding initial velocity

  1. Feb 26, 2009 #1
    1. The problem statement, all variables and given/known data

    A projectile must be fired from a cannon and hit the enemy headquarters located on the top of a cliff 75.0 m above and 350 m from the cannon. The cannon will shoot the projectile at an angle 40.0 degrees above the horizontal. What does the speed of the projectile need to be when it is fired from the cannon so that it will hit the enemy headquarters. Don't assume the projectile will hit the headquarters at the highest point of it's flight.

    2. Relevant equations[/b

    3. The attempt at a solution
  2. jcsd
  3. Feb 26, 2009 #2


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    Welcome to PF.

    What are your thoughts on how to answer the question?
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