Quiz Chapters 1 and 2

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

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

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

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

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

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

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

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)

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

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

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).

Quiz Chapters 1 and 2