(13%) Problem! 5: A seagull flies at a velocity of 95 ms relative to the air str
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Question
(13%) Problem! 5: A seagull flies at a velocity of 95 ms relative to the air straight into the wind. Randomized Variables 19 min 6.4 km 50% Part (a) If it takes the bird 19 min to travel 6.4 km relative to the Earth, what is the velocity of the wind, in meters relative to the Earth? Take the direction of travel of the seagull to be positive. Dc Po (IVI 7 | 8 | 9 4 5 6 sino cos() tan() cotan0 asin0 acos( atanO acotan0 sinh0 coshO tanh cotanhO Att 1 2 3 deta Degrees C) Radians Submit Hint Hints: 0%dedution per hint. Hints temaiing: 2 Feedback: 0% deduction per feedback. 50% Part (b) If the bird tums around and flies with the wind, how long, in minutes, will it take to return 64 kn? Allcontent O2018 Expert TA, Luc F6 1 F5 F7 F8 F9Explanation / Answer
a)
VS = velocity of seagul = distance travelled / time taken = d/t = 6.4 x 1000/(19 x 60) = 5.6 m/s
VSA = velocity of seagul relative to air = 9.5 m/s
VA = velocity of wind
using the equation
VSA = VS - VA
9.5 = 5.6 - VA
VA = - 3.9 m/s
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