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Solving for average acceleration.

  1. Sep 8, 2009 #1
    1. The problem statement, all variables and given/known data

    A car initially moving at 12 m/s [E 30o N] accelerates until it reaches a final velocity of 10 m/s [E]. What was the average acceleration of the car?

    I couldn't attempt anything. There isn't any magnitude given save for velocity, so I have no clue how to solve this, and whether it's even possible.
  2. jcsd
  3. Nov 12, 2009 #2
    you can't tell the avarage acceleration if you don't know in how much time the car decelerate from 12 to 10 m/s.
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