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Magnitude of centripedal acceleration

  1. Nov 11, 2008 #1
    1. The problem statement, all variables and given/known data

    car speed from 40m/s to 84m/s
    traveling counterclockwise around a track 6.6x10^2m
    when it reaches 68m/s find:
    magnitude of centripedal acceleration
    angular speed
    tangential acceleration
    magnitude of total acceleration

    2. Relevant equations
    ac=v^2/r
    w=v/r
    at= (v-vo)/delta t
    a=square root of (ac^2+at^2)


    3. The attempt at a solution

    I have no idea where to start its been a while since I did physics problems.
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Nov 11, 2008 #2

    PhanthomJay

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    Re: acceleration

    Your equations are good, but some info is missing in the problem statement. Is the time given? Is 660m the radius of the track?
     
  4. Nov 11, 2008 #3
    Re: acceleration

    Yes, 660m is the radius of the track.

    No time is given all it states is that accelerates from 40 m/s to 84 m/s and to find all that info once the car reaches 68m/s

    Thanks
     
  5. Nov 11, 2008 #4
    Re: acceleration

    Witht the info you have given you can only determine the angular speed and the centripetal acceleration.

    The tangential acceleration and the total acceleration need more info....
     
  6. Nov 13, 2008 #5
    Re: acceleration

    So here is what I came up with for magnitude and angular speed:

    7.006m/s2

    0.103rad/s
     
  7. Nov 13, 2008 #6
    Re: acceleration

    Numerically fine, but too many digits.
     
  8. Nov 14, 2008 #7
    Re: acceleration

    Thanks.

    Now if I could only figure out how you would get the tangential and total acceleration. There is no other information provided in the problem.:confused:
     
  9. Nov 14, 2008 #8
    Re: acceleration

    Where did you get this problem? If your teacher made it up you can ask for more info!
    Or is it part of a larger question, and some info was given for previous parts?
     
  10. Nov 14, 2008 #9
    Re: acceleration

    My teacher gave us this problem, but there is no other info given besides what I hvae. I have already emailed him and still have not got a response.:frown:
     
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