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Ch3_TestBank - Chapter 3 Vectors and Two-Dimensional Motion...

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Chapter 3, Vectors and Two-Dimensional Motion 24 C HAPTER 3 3.1 Vectors and Their Properties 1. Which type of quantity is characterized by both magnitude and direction? a. scalar b. vector c. trigonometric d. algebraic variable 2. Which of the following is an example of a vector quantity? a. velocity b. temperature c. volume d. mass 3. When we subtract a velocity vector from another velocity vector, the result is: a. another velocity. b. an acceleration. c. a displacement. d. a scalar. 4. When we add a displacement vector to another displacement vector, the result is: a. a velocity. b. an acceleration. c. another displacement. d. a scalar. 5. A student adds two vectors with magnitudes of 200 and 40. Which one of the following is the only possible choice for the magnitude of the resultant? a. 100 b. 200 c. 260 d. 40 6. Vector A r points north and vector B r points east. If C r = B r A r , then vector C r points: a. north of east. b. south of east. c. north of west. d. south of west.

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Chapter 3, Vectors and Two-Dimensional Motion 25 7. The first displacement is 6 m and the second displacement is 3 m. They cannot add together to give a total displacement of: a. 2 m. b. 3 m. c. 6 m. d. 9 m. 8. Vector A r is 3 m long and vector B r is 4 m long. The length of the sum of the vectors must be: a. 5 m. b. 7 m. c. 12 m. d. some value from 1 m to 7 m. 9. When three vectors are added graphically and form a closed triangle, the largest enclosed angle between any two of the vectors cannot be greater than: a. 60 ° . b. 90 ° . c. 180 ° . d. No maximum exists. 10. A runner circles a track of radius 100 m one time in 100 s at a constant rate. The greatest change in his velocity from his starting velocity: a. occurs one-fourth of the way around the track. b. occurs one-half of the way around the track. c. occurs three-fourths of the way around the track. d. Both a and c are correct. 3.2 Components of a Vector 11. An object, initially moving in the negative x-direction, is subjected to a change in velocity in the positive y-direction. If the resulting velocity vector is drawn from the origin, into which quadrant does this vector point? a. 1 st b. 2 nd c. 3 rd d. None, since the object is now moving in the y-direction.
Chapter 3, Vectors and Two-Dimensional Motion 26 12. A car is initially moving at 20 m/s east and a little while later it is moving at 10 m/s north. Which of the following best describes the orientation of the average acceleration during this time interval? a. northeast b. northwest c. west d. north of west 13. A hiker walks 200 m west and then walks 100 m north. In what direction is her resulting displacement? a. north b. west c. northwest d. None of the answers is correct. 14. An object moves at a constant velocity of 11 m/s to the southwest for an interval of 20 s.

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Ch3_TestBank - Chapter 3 Vectors and Two-Dimensional Motion...

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