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Homework Help: Centripical acceloration question

  1. Nov 7, 2012 #1
    1. The problem statement, all variables and given/known data
    Part 1. A hawk flies in a horizontal arc of radius 10.7m at a constant speed 3.75m/s. find the centripetal acceleration.

    Part 2. It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.30m/s^2. find the acceleration in this situation at the moment the harks speed is 3.75m/s.

    direction in degrees from direction of velocity towards center of circle

    2. Relevant equations
    Ac=v^2 / r

    3. The attempt at a solution

    Ac=(3.75)^2 / 10.7 = 1.31m/s^2

    Part 2.
    Im very confused with this problemt because it says its accelorating to the same speed?
  2. jcsd
  3. Nov 7, 2012 #2


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    Homework Helper

    Your part 1 looks good.
    In part 2, it asks for the "acceleration", not just the "centripetal acceleration". The acceleration due to the speed increasing will be perpendicular to the centripetal acceleration, so you'll need a diagram to figure out the combination and its angle.
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