A hawk flies at 12.0 m/s in a horizontal circle of radius 12.0 m. Now suppose it flaps its wings harder and increases its circular speed at the rate of 1.20 m/s2 while staying in the same circular path. What is the magnitude of its acceleration, and in what direction is the acceleration vector?

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Chapter7: Rotational Motion And The Law Of Gravity
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Problem 15P: A car initially traveling eastward turns north by traveling in a circular path at uniform speed as...
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A hawk flies at 12.0 m/s in a horizontal circle of radius 12.0 m.

  • Now suppose it flaps its wings harder and increases its circular speed at the rate of 1.20 m/s2 while staying in the same circular path. What is the magnitude of its acceleration, and in what direction is the acceleration vector?
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Could you provide a diagram and explanation of why the arctan of Ac/At gives the direction of the acceleration vector? I'd like to understand. I'm assuming that the angle is in reference to the axis of the radius. Thank you.

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