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Homework Help: 2 objects whit acceleration

  1. Mar 5, 2010 #1
    1. The problem statement, all variables and given/known data
    Two objects start from same point whit 4s one after another traveling same direction whit
    speed01 =5 m/s ; a01=0.5 m/s2
    and
    speed02=2 m/s ; a 02=1 m/22

    [tex]\tau[/tex]=4s

    Find at what time the objects meet?

    Answer:28 s
    2. Relevant equations
    d01=S01*t01*(a01+t012)/2
    d02=S02*t02*(a02+t022)/2
    (I think!)
    3. The attempt at a solution
    t01=S01/a01
    t02=S02/a02

    After fiding the distance from equation's i get stuck
     
  2. jcsd
  3. Mar 5, 2010 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi sese! Welcome to PF! :smile:

    (btw, we usually use v or u for speed, not s, and s for distance, not d :wink:)
    No, those equations are wrong.

    You need s = vit + at2/2.

    See the PF Library on constant acceleration :wink:
     
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