Download Version A of Chapter 11 Quiz

Chapter 11 Quiz 1 Version A
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Name: ________________________ Hour: ______
1. A passenger in the rear seat of a car moving at a steady speed is at rest relative to
a. the side of the road.
c. the driver of the car.
b. a pedestrian on the corner ahead.
d. a car passing in the opposite direction.
2. Which distance can be most accurately measured with a ruler?
a. the length of a river
c. the distance between two cities
b. the width of a book
d. the size of an object under a microscope
3. A person walks 2 miles every day for exercise, leaving her front porch at 9:00 am. and returning to
her front porch at 9:25 am. What is the total displacement of her daily walk?
a. 2 miles
c. 25 minutes
b. 0
d. none of the above
4. A person drives north 5 blocks, then turns west, and drives 5 blocks. The driver then turns south and
drives 5 blocks. How could the driver make the distance shorter while the same displacement?
a. by driving west 5 blocks from the starting point
b. by driving north 10 block and west 5 blocks
c. by driving south 5 blocks from the starting point
d. by driving back to the starting point by the same route
5. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball
rolls downhill 9 meters before coming to rest against a tree. What is the ball’s distance?
a. 4 meters uphill
c. 4 meters downhill
b. 14 meters
d. 0
6. A ball is rolled uphill a distance of 5 meters before it slows, stops, and begins to roll back. The ball
rolls downhill 9 meters before coming to rest against a tree. What is the ball’s displacement?
a. 4 meters uphill
c. 4 meters downhill
b. 14 meters
d. 0
7. Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north combine to distance of
a. 16 km
c. 2 km south
b. 18 km
d. 6 km south
8. Displacement vectors of 4 km south, 2 km north, 5 km south, and 5 km north combine to a total
displacement of
a. 16 km
c. 2 km south
b. 18 km
d. 6 km south
9. What is the most appropriate SI unit to express the speed of a cyclist in the last leg of a 10-km race?
a. km/s
c. mm/s
b. km/h
d. cm/h
10. Speed is the ratio of the distance an object moves to
a. the amount of time needed
c. the displacement of the object.
b. the direction the object moves.
d. the motion of the object.
11. Instantaneous speed is measured
a. at the starting point.
c. at a particular instant.
b. when the object reaches its destination.
d. over the duration of the trip.
12. A car traveled 30 km in 2 hours, 42 km in the next 1 hour, and then 34 km in 2 hours before reaching
its destination. What was the car’s average speed?
a. 21 km/h
c. 148 km/h
b. 42 km/h
d. 1060 km/h
13. The slope of a line on a distance-time graph is
a. distance.
c. speed.
b. time.
d. displacement.
____ 14. A horizontal (flat) line on a distance-time graph means the object is
a. moving at a constant speed.
c. slowing down.
b. moving faster.
d. at rest.
____ 15. What is the speed of a bobsled whose distance-time graph indicates that it traveled 250 m in 25 s?
a. 4 m/s
c. 0.25 mph
b. 250 m/s
d. 10 m/s
____ 16. A distance-time graph indicates that an object moves 100 m in 4 s , remains at rest for 1 s, and then
moves 150 m in 5 s. What is the average speed of the object?
a. 50 m/s
c. 10 m/s
b. 25 m/s
d. 100 m/s
Completion: Complete each statement.
17. A vector quantity includes magnitude and ___________________.
18. The sum of two or more vectors is called the _________________________.
19. A car’s speedometer measures ____________________speed.
20. A straight line on a distance-time graph indicates ____________________ speed.
21. The difference b/t speed and velocity is that velocity indicates the _____ of motion, speed does not.
22. Even when you are “sitting still” you are travelling at a very high velocity. Explain how possible.
23. A child rolls a ball 6 m up a hill. The ball stops and rolls halfway back. What is the displacement?
24. If you ride your bike at an average speed of 7 km/h and need to travel a total distance of 28 km, how
long will it take you to reach your destination? Show your work.
25. A ball is traveling at a constant speed around the inside of a circular structure. Is the ball’s velocity
changing? Explain.
26-27: A girl walks from her home to a friend’s home 3 blocks north. She then walks 2 blocks east to the
post office, 1 block north to the library, and 1 block east to the park. From the park, she walks 2
blocks west to the movie theater. After the movie, she walks 4 blocks south to the pet store.
26. Find the distance the girl walks.
27. Find the girl’s displacement.
28. Which graph in Figure 11-2 shows acceleration? Explain your answer.
29. Look at Figure 11-2. Describe the motion of the object in Graph A from 0 to 8 seconds?
30. Using Graph A, calculate the speed of the object during the first 8 seconds. Show your work
Use the graph provided to answer questions 31-35:
31. How far does Marie live from work?
32. How long did it take Marie to get to work?
33. At which point does Marie turn around?
34. How long does she stop and wait for a train to pass?
35. During which interval is Marie travelling the fastest?