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Homework Help: Rotational Motion Question. Please help!

  1. Oct 8, 2011 #1
    A car is traveling around a horizontal circular track with radius r = 270 m at a constant speed v = 17 m/s as shown. The angle θA = 23° above the x axis, and the angle θB = 58° below the x axis.

    1. What is the x component of the car’s acceleration when it is at point A?

    2.What is the y component of the car’s acceleration when it is at point A?

    3.What is the x component of the car’s acceleration when it is at point B?

    4. What is the y component of the car’s acceleration when it is at point B?


    I found the magnitude of the car's acceleration to be 1.07m/s^2. But all the tangential and radial angles are really confusing me at the moment =(. If anyone could help me or just briefly explain that would be great.

    [PLAIN]http://www.smartphysics.com/images/content/mechanics/ch3/CarOnCurve2.png [Broken]
     
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Oct 8, 2011 #2

    Redbelly98

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    For an object travelling in a circle at constant speed, in what direction does the acceleration point? (If you don't know, there should be a discussion in your physics textbook that addresses my question.)
     
  4. Oct 9, 2011 #3
    Use triangles.
     
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