Tutorials In Introductory Physics: Homework
1st Edition
ISBN: 9780130662453
Author: Lillian C. McDermott, Peter S. Shaffer
Publisher: PEARSON
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Textbook Question
Chapter 15.4, Problem 4bTH
On the diagram at right, draw vectors that represent the acceleration of the car at each labeled point.
- Explain how your acceleration vector at point A is consistent with your answer to question 3 above.
- Explain how the fact that the car is speeding up at a constant rate is represented by the acceleration vectors you have drawn. (Hint: Consider the component of the acceleration parallel to the velocity.)
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Two students, student 1 and student 2, are discussing the graph shown above, which shows the vertical component of the velocity of the box from when it leaves the ramp to immediately before it hits the floor. The students make the following statements.
Student 1: This graph shows that the vertical acceleration of the box is constant, and that the box’s speed decreases for the entire time shown.
Student 2: The area between the graph and the time axis is the box’s vertical displacement, but the graph is incorrect because the positive displacement should be equal to the negative displacement.
(e) Which underlined phrase or phrases in student 2’s statement are correct, if either? If neither phrase is correct, write “none.”
Two students, student 1 and student 2, are discussing the graph shown above, which shows the vertical component of the velocity of the box from when it leaves the ramp to immediately before it hits the floor. The students make the following statements.
Student 1: This graph shows that the vertical acceleration of the box is constant, and that the box’s speed decreases for the entire time shown.
Student 2: The area between the graph and the time axis is the box’s vertical displacement, but the graph is incorrect because the positive displacement should be equal to the negative displacement.
(c) Which underlined phrase or phrases in student 1’s statement are correct, if either? If neither phrase is correct, write “none.”
(d) Which underlined phrase or phrases in student 1’s statement are incorrect, if either? If neither phrase is incorrect, write “none.”
(e) Which underlined phrase or phrases in student 2’s statement are correct, if either? If neither phrase is correct, write “none.”
(f)…
Two students, student 1 and student 2, are discussing the graph shown above, which shows the vertical component of the velocity of the box from when it leaves the ramp to immediately before it hits the floor. The students make the following statements.
Student 1: This graph shows that the vertical acceleration of the box is constant, and that the box’s speed decreases for the entire time shown.
Student 2: The area between the graph and the time axis is the box’s vertical displacement, but the graph is incorrect because the positive displacement should be equal to the negative displacement.
(i) Would the slope of the graph of vertical velocity as a function of time shown above part (c) be different for this scenario in which the box is launched from the larger angle? Justify your response.
Chapter 15 Solutions
Tutorials In Introductory Physics: Homework
Ch. 15.1 - Describe the motion. During which periods of time,...Ch. 15.1 - Find the object’s instantaneous velocity at each...Ch. 15.1 - For each of the following intervals, find the...Ch. 15.1 - In which of the cased from part c, if any, is the...Ch. 15.1 - In the interval from t=0s to t=6s , does the...Ch. 15.1 - In the small box on the graph above is a portion...Ch. 15.1 - Next, we expand the section of the previous graph...Ch. 15.1 - All three graphs are representations of the same...Ch. 15.1 - Suppose that the object is speeding up. Which of...Ch. 15.1 - Suppose that the object is slowing down. Which of...
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