WS 13.0-2 Chapter 13 Quiz
Part A: Modified True/False
1. False; Velocity is defined as the rate of change of
displacement.
2. True
3. False; Average acceleration is the change in velocity of
an object over a period of time.
Part B: Completion
4. terminal
5. free fall
6. 9.8 m/s2
Part C: Multiple Choice
7. B; 8. B; 9. C; 10. A; 11. C; 12. C
Part D: Short Answer
13. Sample answer: When a school bus is driving along a
straight road at a constant speed, its displacement is
increasing, its velocity is constant, and its acceleration is
zero. When the school bus approaches a stop sign, it
slows down. As it slows down, its displacement
continues to increase, its velocity decreases, and its
acceleration is negative. When it comes to a stop, its
displacement is constant, and its velocity and
acceleration are both zero. When it starts moving again
in a straight line, its displacement is increasing, its
velocity is increasing, and its acceleration is positive.
WS D-1 Unit D Quiz
Part A: Modified True/False
1. False; The Greek letter _ or delta represents change.
2. True
3. True
4. False; An object traveling in uniform motion has no
acceleration.
Part B: Completion
5. scalar
6. length
7. speed
8. terminal velocity
Part C: Matching
9. (c); 10. (d); 11. (a); 12. (b)
Part D: Multiple Choice
13. D; 14. A; 15. D; 16. B; 17. B; 18. C; 19. C; 20. D;
21. D; 22. B; 23. B
426 Unit D Answer Key NEL
Part E: Short Answer
24. Yes, an object could have started with a negative
velocity, so the acceleration would be positive. Or, the
object could have started with a positive velocity and
have a negative acceleration.