AM-Due Date:9/23/2018 11:59.00 PM End Date:925/3018 11:59:00 PM Homework Ch.3 Be

Question

AM-Due Date:9/23/2018 11:59.00 PM End Date:925/3018 11:59:00 PM Homework Ch.3 Begin Date: 9/162018 120100 (9%) Problem 10: Aseagull flies at a velocity of 0.5 mis relative to the air Randomized Variables VSA-85 m/s t- 18 min d 5.8 km Status for what is the velocity of the wind, in meters per second, relative to 50% Part (a) Ifis takes the bird 18 min to travel 5.8 km relative to the Earth, the Earh? Take the direction of travel of the seaguill to be positive. Grade Sumnary Pcmtal 100% Subniwios AE rtial atan acotan sinh O Degrees O Radians I give up Feedback: dedacticn per foodback Hine 1 deduction per hint. Hints emaising 50% Part (b) If the bird turns around and ties with the wind, how log, in minutes. will it take to retum 58 km? MacBook Air 80 BE&EE 4 5

Explanation / Answer

a) vg = distance / time

vg = 5.8 * 103 / (18 * 60) = 5.37 m/s

speed of wind = vg - vair = 5.37 - 8.5

velocity of the wind = -3.13 m/s [wind in opposite direction]

b) v = 3.13 + 8.5 = 11.63 m/s

t = d / v = 5.8 * 1000 / 11.63

= 499 sec = 8.3 min

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