Quiz Chapters 1 and 2

Mechanics Taxonomy Numerical Accuracy Space, Mass and Time Vectors Polar and Rectangular Coordinates

1. Which of the following variables is a kinematic variable?

a) forceb) workc) speedd) power

2. Which variable is not independent in Newtonian mechanics?

a) massb) spacec) timed) force

3. Which characteristic is not a property of vectors.

a) thicknessb) directionc) signd) magnitude

4. Which number has the correct number of significant figures?

a) 25.67b) 2.1718c) 3450d) 5.0

5. Which of the following is a kinetic variable?

a) accelerationb) velocityc) angular positiond) energy

6. Convert 25.0 m/s to km/h.

a) 6.94b) 90.0c) 0.0250d) 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) mb) (10.26, 28.2) mc) (28.2, 10.26) md) (10.00, 17.32) m

Correct answers

1) c 2) d3) a 4) c5) d 6) b7) b 8) c

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).