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Homework Help: Two projectiles, displacement vs. time

  1. Mar 9, 2013 #1
    A ball is thrown upward with an initial speed, vo.
    When it reaches the top of its flight, at a height h, a second ball is thrown at the same initial velocity.
    sketch a displacement vs time graph for both balls.
    where do the balls cross from the graph.
    Find the height where the paths cross.

    answers: above h/2 and 3/4h

    please help
  2. jcsd
  3. Mar 9, 2013 #2


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    Gold Member

    Well ... draw a graph. You have to show us some work before we know what you are having trouble with.
  4. Mar 9, 2013 #3
    And the title could be more descriptive, too.

    Moderator's edit: note, thread title has been changed since this was posted.
    Last edited by a moderator: Mar 9, 2013
  5. Mar 9, 2013 #4
    Re: homework help

    This is what I have got...
    I am having trouble in the last part..
    Though I have got h (max ht) = vo^2/g

    Attached Files:

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