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A Physics Kinematics Question about Acceleration

  1. Sep 13, 2009 #1
    1. The problem statement, all variables and given/known data
    This is the v-t(velocity-time) graph of two moving objects,A and B :
    attachment.php?attachmentid=20531&stc=1&d=1252830179.jpg
    Please check whether the following statement is true or false(including wrong description).

    At the moment t1, the acceleration of A is BIGGER than that of B.
    PS: In this case,"a vector A is bigger than another one B" means ||A||>||B||.

    2. Relevant equations


    3. The attempt at a solution
    I'm a Chinese senior high school student who is not good at English,so please don't mind mistakes of grammar.I am really trying my best to post this thread.:shy::shy:
    I think this statement is right,but my teacher said that there's no given exact numbers or function expressions and we can't find the exact relationship between line A and line B,including their point of intersection.
    My opinion is that we can find the answer from the graph obviously( considering a very short range covering the point t1, delta(v) of A is obviously bigger than that of B )

    Thank in advance!!
     

    Attached Files:

    Last edited: Sep 13, 2009
  2. jcsd
  3. Sep 13, 2009 #2

    Hootenanny

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    Welcome to Physics Forums.

    I would agree with your conclusion, the magnitude of the acceleration of A is definitely larger than that of B (at t1).
     
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