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Angular ,Radial,linear accelerations

  1. Oct 13, 2013 #1
    1. The problem statement, all variables and given/known data
    A car is going around a corner with a radius of 68m. At one instant, its speed is 19m/s and its speed is increasing at a rate of 3.2m/s^2.
    What are the angular speed and the angular acceleration of the car at this instant?
    What is the total linear acceleration of the car?
    If the angular acceleration remains constant, what will the radial acceleration be after 1.4s?

    2. Relevant equations
    I got alpha=.047rad/s^2 for the first one with aTan/r=alpha
    6.2 m/s^2 for the second with aRad^2+3.2^2 under square root
    I am lost on the 3rd
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Oct 14, 2013 #2
    How do I find the radial acceleration after 1.4 seconds if the angular acceleration remains constant?
     
  4. Oct 15, 2013 #3
    I guess I have a hard question?
    Im thinking to solve this is by using the constant formulas. I really am confused on this tho.
     
  5. Oct 15, 2013 #4
    How did you calculate the radial acceleration when the speed is 19m/s? You did not show this.
    Do you know how to calculate this one?
     
  6. Oct 15, 2013 #5
    Part A and B did not ask for radial acceleration.
    A) what are the angular speed and angular acceleration of the car at this instant?
    B) What is the total linear acceleration of the car?

    C) If the angular acceleration remains constant, what will the radial acceleration be after 1.4s?
    Unless im not understanding your question
     
  7. Oct 15, 2013 #6
    So how did you calculate linear acceleration?
    What do you mean by
    "aRad^2+3.2^2 under square root"?
     
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