QTest #2-solutions

# QTest #2-solutions - Version 065/ABAAB QTest#2...

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Version 065/ABAAB – 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 26 north oF west with a speed oF 96 km / h. Three hours later, it shiFts due north, and its speed slows to 16 km / h. How Far From Grand Bahama is the eye 4 . 50 h aFter it passes over the island? 1. 276.967 2. 348.663 3. 244.677 4. 177.339 5. 333.359 6. 299.299 7. 362.683 8. 289.143 9. 144.312 10. 266.271 Correct answer: 299 . 299 km. Explanation: Let : θ = 26 , t 1 = 3 h , t 2 = 1 . 5 h , v 1 = 96 km / h , and v 2 = 16 km / h . 96 km / h 26 16 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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QTest #2-solutions - Version 065/ABAAB QTest#2...

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