ch03 - Chapter 3: VECTORS 1. We say that the displacement...

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Chapter 3: VECTORS 1. We say that the displacement of a particle is a vector quantity. Our best justi f cation for this assertion is: A. displacement can be speci f ed by a magnitude and a direction B. operating with displacements according to the rules for manipulating vectors leads to re- sults in agreement with experiments C. a displacement is obviously not a scalar D. displacement can be speci f ed by three numbers E. displacement is associated with motion ans: B 2. The vectors n a , n b , and n c are related by n c = n b n a . Which diagram below illustrates this relationship? ................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ........ n a n b n c A ................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................................ . . . . . . . . . . . . n a n b n c B ................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . n a n b n c C ................................ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . n a n b n c D E. None of these ans: D 3. A vector of magnitude 3 CANNOT be added to a vector of magnitude 4 so that the magnitude of the resultant is: A. zero B. 1 C. 3 D. 5 E. 7 ans: A 4. A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of this sum might be: A. zero B. 3 C. 12 D. 47 E. 50 ans: C Chapter 3: VECTORS 27
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5. A vector n S of magnitude 6 and another vector n T have a sum of magnitude 12. The vector n T : A. must have a magnitude of at least 6 but no more than 18 B. may have a magnitude of 20 C. cannot have a magnitude greater than 12 D. must be perpendicular to n S E. must be perpendicular to the vector sum ans: A 6. The vector n A is: A. greater than n A in magnitude B. less than n A in magnitude C. in the same direction as n A D. in the direction opposite to n A E. perpendicular to n A ans: D 7. The vector n V 3 in the diagram is equal to: . . . . . . . . . . . . . . . . . . . . . . . . . . . θ
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ch03 - Chapter 3: VECTORS 1. We say that the displacement...

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