Concept explainers
(a)
The instantaneous speed of car B at
(a)
Answer to Problem 98A
The instantaneous speed of car B at
Explanation of Solution
Given info:
The position versus time graph for car
Formula used:
The object’s speed at a given instant of time is known as the instantaneous speed of the object. The slope of the position-time graph of an object at an instant of time represents the instantaneous speed of the object at that instant of time.
The instantaneous speed of an object is the slope of the object’s position-time graph at that instant of time.
Calculation:
Refer to the position-time graph of the car
The car
Hence, the instantaneous speed of the car
Conclusion:
Thus, the instantaneous speed of the car
(b)
The instantaneous speed of car B at
(b)
Answer to Problem 98A
The instantaneous speed of car B at
Explanation of Solution
Given info:
The position versus time graph for car
Formula used:
The object’s speed at a given instant of time is known as the instantaneous speed of the object. The slope of the position-time graph of an object at an instant of time represents the instantaneous speed of the object at that instant of time.
The instantaneous speed of an object is the slope of the object’s position-time graph at that instant of time.
Calculation:
Refer to the position-time graph of the car
The instantaneous speed of an object is the slope of the object’s position-time graph at that instant of time.
The slope of the position-time graph is almost horizontal and parallel to the horizontal axis at time
The slope of the position-time graph is almost zero at time
Hence, the instantaneous speed of the car
Conclusion:
Thus, the instantaneous speed of the car
(c)
The instantaneous speed of car A at
(c)
Answer to Problem 98A
The instantaneous speed of car A at
Explanation of Solution
Given info:
The position versus time graph for car
Formula used:
The object’s speed at a given instant of time is known as the instantaneous speed of the object. The slope of the position-time graph of an object at an instant of time represents the instantaneous speed of the object at that instant of time.
The instantaneous speed of an object is the slope of the object’s position-time graph at that instant of time.
Calculation:
Refer to the position-time graph of the car
Find the slope of the position-time graph of the car
The slope of the position-time graph of the car
The instantaneous speed of an object is the slope of the object’s position-time graph at that instant of time.
Conclusion:
Thus, the instantaneous speed of the car
Chapter 4 Solutions
Glencoe Physics: Principles and Problems, Student Edition
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