Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
4th Edition
ISBN: 9780134110684
Author: Randall D. Knight (Professor Emeritus)
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 1CQ
Can the magnitude of the displacement vector be more than the distance travelled? Less than the distance travelled? Explain.
Expert Solution & Answer
To determine
Whether displacement vector is greater or lesser than the distance traveled.
Answer to Problem 1CQ
The magnitude of displacement vector can never be greater than the distance traveled.
Explanation of Solution
Displacement is the shortest distance between initial and final point. Hence, it should be a straight line connecting between them. Distance is the total path traveled by the body. So, it will be always greater or equal to the displacement. This can be understood better from the following diagram.
Consider a particle moving from A to B. If the particle moves from A to B in a straight-line path i.e. ACB, then it will be the shortest distance in a particular direction which is nothing but displacement. Instead, if the particle moves from A to B along the path ADB, it will not have any specified direction and also it will be one of the largest path, which is nothing, but the distance traveled.
Conclusion:
Hence, the magnitude of the displacement vector is always less than or equal to the distance traveled.
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Can someone please help me understand this question and how to get the answer?
Two displacement vectors have magnitudes of 5.0 m and 7.0 m, respectively. If these two vectors are added together, the magnitude of the sum is:
1.) equal to 8.6m
2.) could be as small as 2.0m or as large as 12.0m
3.)is equal to 2m
4. or is equal to 12m.
Thank you. I am really confused.
Question: When vector A is added to vector B", the result is 6 i- j, when B* is subtracted
from A ", the results is 2 i+7j^.What is the magnitude of vector A "?
A) 5
B) 3
C) 4
D) 6
E) 7
Can i get help with this problem
Chapter 3 Solutions
Physics for Scientists and Engineers: A Strategic Approach, Vol. 1 (Chs 1-21) (4th Edition)
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