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How do find the displacement when it is =ing to distance

  1. Sep 5, 2009 #1
    How do find the displacement when it is =ing to distance!!!!

    I am new here ,so plz bear with me by helping in this simple problem:confused::cry:
    Problem:A ball moes on ta smooth floor in a straight line with uniform velocity 10meters/seconds for 6seconds.At t=6seconds, the ball hits a wall and comes back along the same line to the starting point with same speed.Draw the velocity -time graph and use it to find the total distance travelled by the ball and its displacement.
    My try:
    I had tried to make rough graph but the problem is that it is not coming displacement as 0
    Because if velocity =10m/s & time=12(total time after returning)
    .: displacement=v*t=10*12=120
    But as it comes back to its origional place ,I don't understand , How does it happen ?&
    How do I represent it?:frown:
    .Plz can anyone clear the consepts ?!!:frown:
     
    Last edited: Sep 5, 2009
  2. jcsd
  3. Sep 5, 2009 #2

    CompuChip

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    Re: How do find the displacement when it is =ing to distance!!!!

    Hint: velocity, apart from a magnitude, also has a direction.
     
  4. Sep 6, 2009 #3
    Re: How do find the displacement when it is =ing to distance!!!!

    THANKS A LOT CompuChipip!!:smile::rofl::rofl:
    I think I got the answer, as there is a negetive velocity due to moving back of the ball.:
    It appears like this
    |V
    |
    | __________
    | .
    | .
    | .
    |0_________ 6_________12______ (i dont know but the image is not coming correct)
    | . . T
    | . .
    | . .
    | .__________.
    |V'
    So,total area=(10*6)+(-10*6)=60-60=0=displacement!I am sooo happy!!:rofl:
    Thanks million for ur help!!Keep helping!!:approve::smile::smile:
     
  5. Sep 7, 2009 #4

    CompuChip

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    Re: How do find the displacement when it is =ing to distance!!!!

    Code (Text):

    |V
    |
    | __________                              
    |           .                
    |           .
    |           .
    |0_________ 6_________12______      
    |           .          .           T
    |           .          .
    |           .          .
    |           .__________.
    |V'
     
    Yep, exactly right! :)
     
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