1. Not finding help here? Sign up for a free 30min 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!

Finding Acceleration

  1. Mar 19, 2010 #1
    1. The problem statement, all variables and given/known data

    A motorist enters a freeway at 45km/h and accelerates uniformly to 99 km/h. From the odometer of the car, the driver knows she has travelled 0.2km. Find the acceleration of the car.

    2. Relevant equations



    3. The attempt at a solution

    I attempted this:

    v2 = u2 + 2as

    Substituting the values in I got this:
    (992 -452)/0.4 = a

    this gives 19440, so converting to m/sec I think I get 5400 m/sec2

    This is definitely not right, any ideas why?

    Cheers,
    Adrian :)
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Mar 19, 2010 #2

    Doc Al

    User Avatar

    Staff: Mentor

    What units do you think the 19440 would be in? Check your conversion.

    The best thing to do is change units to m/s and m before you use them in the formula.
     
  4. Mar 19, 2010 #3
    Got it! Thanks a bunch!

    Cheers,
    Adrian
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Finding Acceleration
  1. Finding Acceleration (Replies: 3)

  2. Find the Acceleration (Replies: 11)

  3. Find acceleration (Replies: 4)

  4. Finding acceleration (Replies: 18)

Loading...