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Homework Help: Motion Problem

  1. Jul 23, 2006 #1
    Person A standing on the roof throws a book up vertically at 10m/s. At the same time, another person below that person 12 m throughs a ball at 25 m/s.

    when will the 2 objects meet and how far above the roof do they meet?

    -This reminds me of that train question I used to always get in math class but I am not sure how I solve this since gravity will also be having an effect on this question as well.
  2. jcsd
  3. Jul 23, 2006 #2
    It is always a good practice to write the equations for the problem. You will get a simultaneous equation. What can you do with that?
  4. Jul 23, 2006 #3


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    Staff: Mentor

    Write the equation for vertical motion of each object. Then solve for the time t when their y values are the same. Welcome to PF, BTW.
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