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Quiz Chapters 1 and 2 Numerical Accuracy Space, Mass and Time Vectors Polar and Rectangular Coordinates

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1. Which of the following variables is a kinematic variable? a) force b) work c) speed d) power

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2. Which variable is not independent in Newtonian mechanics? a) mass b) space c) time d) force

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3. Which characteristic is not a property of vectors. a) thickness b) direction c) sign d) magnitude

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4. Which number has the correct number of significant figures? a) 25.67 b) 2.1718 c) 3450 d) 5.0

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5. Which of the following is a kinetic variable? a) acceleration b) velocity c) angular position d) energy

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6. Convert 25.0 m/s to km/h. a) 6.94 b) 90.0 c) 0.0250 d) 1.500

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7. What are the polar coordinates of the vector: (4.00, 5.00)? a) (9.00, 51.0 degrees) b) (6.40, 51.0 degrees) c) (9.00, 38.7 degrees) d) (6.40, 38.7 degrees)

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8. What are the rectangular coordinates of a vector of 30.0 metres at 20.0 degrees from the horizontal? a) (17.32, 10.00) m b) (10.26, 28.2) m c) (28.2, 10.26) m d) (10.00, 17.32) m

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Correct answers 1) c = speed 2) d = force 3) a = thickness 4) c = 3450 5) d= energy 6) b = 90.0 km/h 7) b = 6.40 at 51.0 deg 8) c = (28.2, 10.26)

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Rank yourself 7-8: You may have a career in biomechanics! 5-6: Not bad but you can do better. 3-4: Did you read the questions or did you close your eyes and point? 0-2: You need to read the textbook (probably several times).

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