Concept explainers
(a)
The time for which J had walked when H started walking.
(a)
Explanation of Solution
Introduction:
In a position time graph the position is plotted on the y axis and the time in the axis. The slope of the graph gives us the velocity.
From graph,
On the x axis, every small unit is
Conclusion:
The time for which J had walked when Hstarted walking is
(b)
Whether H meets J.
(b)
Explanation of Solution
Introduction:
In a position time graph, the position is plotted on the y axis and the time in the axis. The slope describes the velocity. If the graph is a straight line, then the velocity is constant.
The slope of a position time graph describes the velocity. The steeper the line, greater is the velocity. From the graph, J’s slope is steeper than H’s therefore Hwill not catch up J.
Conclusion:
J’s slope is steeper than H’s therefore H will not catch up J.
(c)
Position of J at
(c)
Explanation of Solution
Introduction:
In a position time graph, the position is plotted on the y axis and the time in the axis. The slope describes the velocity. If the graph is a straight line, then the velocity is constant.
On the x axis every small unit is
From the graph, in J’s line the corresponding value of position for
Conclusion:
Position of Juanita at
(d)
Time of Heather when his position is at 5 km.
(d)
Explanation of Solution
Introduction:
In a position time graph, the position is plotted on the y axis and the time in the axis. The slope describes the velocity. If the graph is a straight line, then the velocity is constant.
On the x axis, every small unit is
From the graph, in H’s line the corresponding value of time for position at
Conclusion:
The time when Heather is
Chapter 2 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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