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# Ch03 - Chapter 3 Vectors and Two-Dimensional Motion C...

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Unformatted text preview: Chapter 3, Vectors and Two-Dimensional Motion C HAPTER 3 11. Arvin the Ant is on a picnic table. He travels 30 cm eastward, then 25 cm northward and finally 15 cm westward. What is the magnitude of Arvin’s net displacement? a. 70 cm b. 57 cm c. 52 cm d. 29 cm 12. Arvin the Ant travels 30 cm eastward, then 25 cm northward and finally 15 cm westward. What is Arvin’s direction of displacement with respect to his original position? a. 59 ° N of E b. 29 ° N of E c. 29 ° N of W d. 77 ° N of E 13. 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 22. Five boys are pushing on a snowball, and each is pushing with a force of 10.0 N. However, each boy is pushing in a different direction. They are pushing north, northeast, east, southeast, and south. (Each boy is pushing at an angle of 45.0 ° relative to his neighbor.) What is the magnitude of the total force on the ball? a. 0 b. 17.1 N c. 24.1 N d. 27.1 N 23. John throws a baseball from the outfield from shoulder height, at an initial velocity of 29.4 m/s at an initial angle of 30.0 ° with respect to the horizontal. The ball is in its trajectory for a total interval of 3.00 s before the third baseman catches it at an equal shoulder-height level. (Assume air resistance negligible.) What is the ball’s horizontal displacement? a. 76.4 m b. 38.2 m c. 57.3 m d. zero 24. A baseball thrown from the outfield is released from shoulder height at an initial velocity of 29.4 m/s at an initial angle of 30.0 ° with respect to the horizontal. If it is in its trajectory for a 19 Chapter 3, Vectors and Two-Dimensional Motion total of 3.00 s before being caught by the third baseman at an equal shoulder-height level, what is the ball’s net vertical displacement during its 3-s trajectory? a. 11.0 m b. 9.80 m c. 22.1 m d. zero 25. A baseball thrown from the outfield is released from shoulder height at an initial velocity of 29.4 m/s at an initial angle of 30.0 ° with respect to the horizontal. What is the maximum vertical displacement that the ball reaches during its trajectory?...
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Ch03 - Chapter 3 Vectors and Two-Dimensional Motion C...

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