QTest #2-solutions

# QTest#2-solutions - Version 103/ABCBD QTest#2 Antoniewicz(56445 This print-out should have 3 questions Multiple-choice questions may continue on

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Version 103/ABCBD – QTest #2 – Antoniewicz – (56445) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points As it passes over Grand Bahama Island, the eye oF a hurricane is moving in a direction 14 north oF west with a speed oF 94 km / h. Three hours later, it shiFts due north, and its speed slows to 11 km / h. How Far From Grand Bahama is the eye 4 . 50 haFteritpassesovertheis land? 1. 253.533 2. 326.427 3. 190.342 4. 338.636 5. 177.339 6. 286.439 7. 182.912 8. 292.386 9. 230.243 10. 330.8 Correct answer: 286 . 439 km. Explanation: Let : θ =14 , t 1 =3h , t 2 =1 . 5h , v 1 =94km / h , and v 2 =11km / h . 94 km / h 14 11 km / h With ˆ ı representing east and ˆ representing north, the total displacement oF the hurricane is R = R x ˆ ı + R y ˆ =( v 1 x ˆ ı + v 1 y ˆ ) t 1 +( v 2 x ˆ ı + v 2 y ˆ ) t 2 Since R x = v 1

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## This note was uploaded on 11/17/2011 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas at Austin.

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QTest#2-solutions - Version 103/ABCBD QTest#2 Antoniewicz(56445 This print-out should have 3 questions Multiple-choice questions may continue on

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