Passage Problems Laptop computers are equipped with accelerometers that sense when the device is dropped and then put the hard drive into a protective mode. Your computer geek friend has written a program that reads the accel- erometer and calculates the laptop's apparent weight. You're amusing yourself with this program on a long plane flight. Your laptop weighs just 5 pounds, and for a long time that's what the program reports. But then the "Fasten Seatbelt" light comes on as the plane encounters turbu- lence. Figure 4.27 shows the readings for the laptop's apparent weight over a 12-second interval that includes the start of the turbulence. 76. At the first sign of turbulence, the plane's acceleration a. is upward. b. is downward. c. is impossible to tell from the graph. 77. The plane's vertical ac- celeration has its greatest magnitude a. during interval B. b. during interval C. c. during interval D. 78. During interval C, you can conclude for certain that the plane is Apparent weight (lb) B A E 0 2 4 6 8 10 12 Time (s) FIGURE 4.27 The laptop's apparent weight (Passage Problems 76-79). a. at rest. b. accelerating upward. c. accelerating downward. d. moving with constant vertical velocity. 79. The magnitude of the greatest vertical acceleration the plane un- dergoes during the time shown on the graph is approximately a. 0.5 m/s². c. 5 m/s². b. 1 m/s². d. 10 m/s².
Passage Problems Laptop computers are equipped with accelerometers that sense when the device is dropped and then put the hard drive into a protective mode. Your computer geek friend has written a program that reads the accel- erometer and calculates the laptop's apparent weight. You're amusing yourself with this program on a long plane flight. Your laptop weighs just 5 pounds, and for a long time that's what the program reports. But then the "Fasten Seatbelt" light comes on as the plane encounters turbu- lence. Figure 4.27 shows the readings for the laptop's apparent weight over a 12-second interval that includes the start of the turbulence. 76. At the first sign of turbulence, the plane's acceleration a. is upward. b. is downward. c. is impossible to tell from the graph. 77. The plane's vertical ac- celeration has its greatest magnitude a. during interval B. b. during interval C. c. during interval D. 78. During interval C, you can conclude for certain that the plane is Apparent weight (lb) B A E 0 2 4 6 8 10 12 Time (s) FIGURE 4.27 The laptop's apparent weight (Passage Problems 76-79). a. at rest. b. accelerating upward. c. accelerating downward. d. moving with constant vertical velocity. 79. The magnitude of the greatest vertical acceleration the plane un- dergoes during the time shown on the graph is approximately a. 0.5 m/s². c. 5 m/s². b. 1 m/s². d. 10 m/s².
Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter7: Gravitation
Section: Chapter Questions
Problem 99A
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Question
Transcribed Image Text:Passage Problems
Laptop computers are equipped with accelerometers that sense when
the device is dropped and then put the hard drive into a protective mode.
Your computer geek friend has written a program that reads the accel-
erometer and calculates the laptop's apparent weight. You're amusing
yourself with this program on a long plane flight. Your laptop weighs
just 5 pounds, and for a long time that's what the program reports. But
then the "Fasten Seatbelt" light comes on as the plane encounters turbu-
lence. Figure 4.27 shows the readings for the laptop's apparent weight
over a 12-second interval that includes the start of the turbulence.
76. At the first sign of turbulence,
the plane's acceleration
a. is upward.
b. is downward.
c. is impossible to tell from
the graph.
77. The plane's vertical ac-
celeration has its greatest
magnitude
a. during interval B.
b. during interval C.
c. during interval D.
78. During interval C, you can
conclude for certain that the
plane is
Apparent weight (lb)
B
A
E
0 2 4 6 8 10 12
Time (s)
FIGURE 4.27 The laptop's
apparent weight (Passage
Problems 76-79).
a.
at rest.
b. accelerating upward.
c. accelerating downward.
d. moving with constant vertical velocity.
79. The magnitude of the greatest vertical acceleration the plane un-
dergoes during the time shown on the graph is approximately
a. 0.5 m/s².
c. 5 m/s².
b. 1 m/s².
d. 10 m/s².
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