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Homework Help: Projectile motion problem

  1. Jul 10, 2009 #1
    1. The problem statement, all variables and given/known data

    If a certain cannon can shoot a projectile a distance of 275m when it is aimed at 66.0 degrees above the horizontal, what is the maximum range the cannon could achieve with the same projectile, and at what angle should it be aimed to do this?

    2. Relevant equations:
    x = Vo(Cos@)t , where @ = angle
    X=Xo + (Vox)t

    3. The attempt at a solution: answers given in text book: 370 m, 45 degrees...I'm still trying to solve the problem, and not knowing time (t) is what leaves me stuck

    Thank you very much for your help! I really appreciate it! :)
  2. jcsd
  3. Jul 10, 2009 #2


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    Welcome to PF :smile:

    Many text books actually discuss the range of projectiles, and give an equation for range as a function of angle and velocity.
  4. Jul 10, 2009 #3
    Hello! Be sure to read the https://www.physicsforums.com/showthread.php?t=5374" of the group sometime:
    Are you sure you have all the equations necessary to solve the problem, by the way?
    Last edited by a moderator: Apr 24, 2017
  5. Jul 11, 2009 #4
    Moderation Note: Complete solution removed. Hootenanny
    Last edited by a moderator: Jul 11, 2009
  6. Jul 11, 2009 #5


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    jontyjashan, you did not need to post the full solution.
  7. Jul 11, 2009 #6
    why shouldnt i post full solution
  8. Jul 11, 2009 #7


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    It's against the rules of Physics Forums! Also, it doesn't help the OP think about and learn the material, which is the reason behind the rule.

    From the Homework Help section at https://www.physicsforums.com/showthread.php?t=5374:
    Last edited: Jul 11, 2009
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