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Homework Help: Physics dimensions of acceleration question

  1. Jan 23, 2005 #1
    i have a question from mastering physics(online site that i do my hw on) that i dont get.

    Question: Find the dimensions [a] of acceleration.

    Express your answer as powers of length (l), mass (m), and time (t).

    and here's a small hint they give you for the equation for acceleration:

    In physics, acceleration a is defined as the change in velocity in a certain time. This is shown by the [tex] a = \triangle v/\triangle t[/tex].. The [tex]\triangle[/tex] is a symbol that means "the change in."

    [a] = _______ (answer can only be expressed in l,m and/or t)
     
  2. jcsd
  3. Jan 23, 2005 #2
    the change in v has same demension of v.... same rule applied to t,too
     
  4. Jan 24, 2005 #3

    yea, but the answer can only be in length (l), mass (m), and time (t).
     
  5. Jan 24, 2005 #4
    what is the demension of v, then
     
  6. Jan 24, 2005 #5
    got the answer, it's [tex]LT^{-2}[/tex]
     
  7. Jan 24, 2005 #6
    yup....................
     
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