
Concept explainers
(a)
The position of jogger.
(a)

Answer to Problem 12SSC
The first jogger would have an initial position of +15 m and the second jogger would
have an initial position of -15 m.
Explanation of Solution
Since both jogger have the same speed thus, the line representing their motion in the position-time graph would have the same slope of 7.5 but would differ in the initial position, such that the first jogger would have an initial position of +15 m and the second jogger would have an initial position of -15 m.
Calculation:
The graph is given below-
Conclusion:
The first jogger would have an initial position of +15 m and the second jogger would
have an initial position of -15 m.
(b)
The speed of joggers.
(b)

Answer to Problem 12SSC
The speed of joggers is (0, 7.5m/s).
Explanation of Solution
As both joggers have the same constant speed and in the same direction, thus the line representation the motion of both joggers would be the same, where the line would have a zero slope and its y-axis have a value of 7.5 m/s.
Calculation:
The graph is given below:
Conclusion:
The speed of joggers is (0, 7.5m/s).
Chapter 3 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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