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What is the average power in accelerating this car

  1. May 1, 2006 #1
    I was given this as a practice problem:

    A 1,000 kg car accelerates from rest to 25.0 m/s in 7.50 s. What is the Average power?

    So far, I know that P= FD/t F=ma
    initial velocity = 0
    final velocity = 25.0 m/s
    t = 7.50 s

    how do I find the acceleration? thx
  2. jcsd
  3. May 1, 2006 #2


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    Gold Member

    The acceleration is [tex] \frac{{dv}}{{dt}}[/tex], the change in velocity over the change in time
  4. May 1, 2006 #3


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    Homework Helper

    You don't have to find the acceleration. Average power is (total work done over a time interval) divided by the time interval.

    Total work done can be calculated by the change in kinetic energy of the car.
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