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Tell me the fourmla for displacement

  1. Oct 27, 2005 #1
    okay i have a question.
    if a squirrel is at 0 on inital velocity and then is at -2 at final velocity.then what is its displacement?
    And i would appreciate it if someone can tell me the fourmla for displacement.:smile:
     
  2. jcsd
  3. Oct 27, 2005 #2
    you need to give alot more info to be able to do this problem

    disp= x_o+v_0*t+1/2at^2
     
  4. Sep 30, 2008 #3
    Re: displacement

    I think you would have a negative displacement you instead of going forwards went backwards your displacement would be 2. I think I have problems with physics so.....
     
  5. Sep 30, 2008 #4

    Mentallic

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    Homework Helper

    Re: displacement

    Like mathmike said, you need to give a lot more information so an accurate displacement can be given, unless you are searching for displacement as a function of acceleration/time etc.

    Using:

    [tex]s=ut+\frac{1}{2}at^{2}[/tex] (1)

    or

    [tex]v^{2}=u^{2}+2as[/tex]
    Hence, [tex]s=\frac{v^{2}-u^{2}}{2a}[/tex] (2)

    where,
    s=displacement
    u=initial velocity
    t=time
    a=acceleration

    Using the information you have given, formula (1) can be simplified to:

    [tex]s=\frac{1}{2}at^{2}[/tex]

    and formula (2) can be simplified to:

    [tex]s=\frac{2}{a}[/tex]

    It is obvious you will at least need acceleration to find the displacement, and yes, the displacement will be negative since your final velocity (v) is negative.
     
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