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Unformatted text preview: mostowfi (nm22898) Assignment # 1  Introductory Physics and 1D Kinematics schultz (WVFAL20 This printout should have 55 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points What would equal 5 meters? 1. 50 dm correct 2. 50 dam 3. 50 mm 4. 50 cm 5. 0.5 km 6. 0.5 hm Explanation: (50 dm) 1 m 10 dm = 5 m 002 10.0 points What unit of measure would you use for mass? 1. None of these 2. liters 3. cubic centimeters 4. grams correct Explanation: Liters and cubic centimeters are units of measure for volume. 003 (part 1 of 5) 10.0 points s is a distance with unit [L], t is a time with unit [T] and is an angle in radians. Find the dimension for the quantity c 1 in the expression s = c 1 t . 1. 1/[L] 2. None of these 3. [T] 2 /[L] 4. [T] 5. 1/[T] 6. [L]/[T] 2 7. 1/[T] 2 8. [T]/[L] 9. [L] 10. [L]/[T] correct Explanation: s = c 1 t c 1 = s t [ c 1 ] = [ s ] [ t ] = [L] / [T] 004 (part 2 of 5) 10.0 points Find the dimension for the quantity c 2 in the expression s = c 2 t 2 . 1. [T] 2. 1/[T] 3. [T] 2 /[L] 4. [L] 5. [L]/[T] 6. 1/[L] 7. [L]/[T] 2 correct 8. 1/[T] 2 9. None of these 10. [T]/[L] Explanation: mostowfi (nm22898) Assignment # 1  Introductory Physics and 1D Kinematics schultz (WVFAL20 c 2 = s t 2 [ c 2 ] = [ s ] [ t ] 2 = [L] / [T] 2 005 (part 3 of 5) 10.0 points WITHDRAWN 006 (part 4 of 5) 10.0 points WITHDRAWN 007 (part 5 of 5) 10.0 points WITHDRAWN 008 10.0 points How many (whole number of) 90 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton? A metric ton is 1 . 000 10 3 kg. Correct answer: 11 people. Explanation: Let : 1 ton = 1 . 000 10 3 kg and R = 90 kg / person . Using dimensional analysis, n = ( 1 . 000 10 3 kg ) 1 person 90 kg = 11 . 1111 persons Note that the numerical answer 11 . 1111 must be rounded down to 11 people because of overload considerations. 009 10.0 points What is equivalent to a cubic centimeter? 1. centiliter 2. milliliter correct 3. liter 4. deciliter Explanation: 1 mL = 1 cc. 010 10.0 points An electron travels 1 . 37 m in 5 . 89 10 8 s. How fast is it traveling? Correct answer: 2 . 32598 10 7 m / s. Explanation: Let : s = 1 . 37 m and t = 5 . 89 10 8 s . v = s t = 1 . 37 m 5 . 89 10 8 s = 2 . 32598 10 7 m / s . 011 10.0 points Convert an acceleration of 5 . 7 mi / h / s to m / s 2 . Correct answer: 2 . 54758 m / s 2 . Explanation: Let : a = 5 . 7 mi / h / s . a = 5 . 7 mi h s 1 . 609 km 1 mi 1000 m 1 km 1 h 3600 s = 2 . 54758 m / s 2 . 012 10.0 points Convert 47 . 7 mi / h to m/s. 1 mi = 1609 m. Correct answer: 21 . 3193 m / s. Explanation: 1 mi = 1609 m 1 h = 3600 s (47 . 7 mi / h) 1609 m 1 mi 1 h 3600 s = 21 . 3193 m / s ....
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 Fall '12
 Marks
 Physics

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