1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Gold Member

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


    User Avatar
    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: What is the average power in accelerating this car