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Homework Help: Need Physics help with launching from angle w/ initial velocity

  1. Sep 30, 2013 #1
    1. The problem statement, all variables and given/known data

    You now place the launcher on the floor and shoot a steel ball at an angle of 45°. If you had previously measured an initial velocity of 3.3 m/s for this launcher, then how far from the launcher do you expect the ball to hit the floor?

    2. Relevant equations

    I can't find any equations for this problem.

    3. The attempt at a solution
    I tried using 45-45-90 angle method to figure out something but nothing has seemed to work. Any help/tips would be appreciated!,
  2. jcsd
  3. Sep 30, 2013 #2


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    hi astru025! :wink:

    use the standard constant acceleration equations in the x and y directions …

    show us what you get :smile:
  4. Sep 30, 2013 #3
    Okay so I have X=3.3cos(45)t
    This gets me to X=2.33t ... What do I do from hear?
  5. Oct 1, 2013 #4


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    How long does the steel ball stay in the air after launch?
  6. Oct 1, 2013 #5


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    hi astru025! :smile:

    (just got up :zzz:)
    now do the same thing for the y direction,

    then use the fact that it lands when y = 0 :wink:
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