solution-hw1

solution-hw1 - lai(yl8859 – HW01 – Ross –(15200 1...

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Unformatted text preview: lai (yl8859) – HW01 – Ross – (15200) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 (part 1 of 2) 10.0 points A submarine dives 148.0 m at an angle of 14.0 ◦ below the horizontal. What is the horizontal component of the submarine’s displacement? Correct answer: 143 . 604 m. Explanation: Let : d = 148 . 0 m and θ = − 14 . ◦ . Δ y Δ x d θ Δ x = d cos θ = (148 m) cos( − 14 ◦ ) = 143 . 604 m . 002 (part 2 of 2) 10.0 points What is the vertical component of the subma- rine’s displacement? Correct answer: − 35 . 8044 m. Explanation: Δ y = d sin θ = (148 m) sin( − 14 ◦ ) = − 35 . 8044 m . 003 (part 1 of 2) 10.0 points Vector vector B has x , y , and z components of 2 . 6, 9 . 8, and 8 . 6 units, respectively. Calculate the magnitude of vector B . Correct answer: 13 . 2951. Explanation: Let : vector B = (2 . 6 , 9 . 8 , 8 . 6) . For the vector vector B = B x ˆ ı + B y ˆ + B z ˆ k . its magnitude is | vector B | = radicalBig B 2 x + B 2 y + B 2 z = 13 . 2951 ....
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solution-hw1 - lai(yl8859 – HW01 – Ross –(15200 1...

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