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Homework Help: Two dimensional acceleration question

  1. Sep 19, 2005 #1

    F.B

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    My book stinks it doesnt explain or show you how to do enough examples. But anyways i have another problem now. I figured out how to do my other question. Anyways my question is.......

    A car with a velocity of 25 m/s [E] changes its velocity to 25 m/s in 15s. Calculate the car's average acceleration.

    How do i start this question off. I dont know what to do.
     
  2. jcsd
  3. Sep 19, 2005 #2
    Are we looking for a magnitude of acceleration or a vector form?
     
  4. Sep 19, 2005 #3

    F.B

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    the magnitude and degrees/direction
     
  5. Sep 19, 2005 #4

    Doc Al

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    Staff: Mentor

    Use the definition of average (vector) acceleration:
    [tex]\vec{a}_{ave} = \frac{\Delta \vec{v}}{\Delta t}[/tex]

    (Hint: To find the change in the velocity, write the initial and final velocity in component form and then subtract.)
     
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