# Test Bank for Physics for Scientists and Engineers 9th Edition by Serway

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## Test Bank for Physics for Scientists and Engineers 9th Edition by Serway

Chapter 2—Motion in One Dimension

MULTIPLE CHOICE

1.The position of a particle moving along the x axis is given by x = (21 22t 6.0t2)m, where t is in s. What is the average velocity during the time interval t = 1.0 s to t = 3.0 s?

 a. −6.0 m/s b. −4.0 m/s c. −2.0 m/s d. −8.0 m/s e. 8.0 m/s

ANS: C PTS: 2 DIF: Average

2.A bullet is fired through a board, 14.0 cm thick, with its line of motion perpendicular to the face of the board. If it enters with a speed of 450 m/s and emerges with a speed of 220 m/s, what is the bullet’s acceleration as it passes through the board?

 a. −500 km/s2 b. −550 km/s2 c. −360 km/s2 d. −520 km/s2 e. −275 km/s2

ANS: B PTS: 3 DIF: Challenging

3.The position of a particle moving along the x axis is given by x = 6.0t2 1.0t3, where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction?

 a. 24 m b. 12 m c. 32 m d. 16 m e. 2.0 m

ANS: D PTS: 3 DIF: Challenging

4.The velocity of a particle moving along the x axis is given for t > 0 by vx = (32.0t 2.00t3) m/s, where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum displacement in the positive x direction?

 a. −64.0 m/s2 b. zero c. 128 m/s2 d. 32.0 m/s2 e. −32.0 m/s2

ANS: A PTS: 3 DIF: Challenging

5.The position of a particle as it moves along the x axis is given for t > 0 by x = (t3 3t2 6t) m, where t is in s. Where is the particle when it achieves its minimum speed (after t = 0)?

 a. 3 m b. 4 m c. 8 m d. 2 m e. 7 m

ANS: B PTS: 2 DIF: Average

6.The position of a particle as it moves along the x axis is given by x = 15e2t m, where t is in s. What is the acceleration of the particle at t = 1.0 s?

 a. 22 m/s b. 60 m/s c. 8.1 m/s d. 15 m/s e. 35 m/s

ANS: C PTS: 2 DIF: Average

7.Vx is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?

 a. −2.0 m b. 2.0 m c. 1.0 m d. −1.0 m e. 6.0 m

ANS: D PTS: 2 DIF: Average

8.A particle moving along the x axis has a position given by x = (24t – 2.0t3) m, where t is measured in s. What is the magnitude of the acceleration of the particle at the instant when its velocity is zero?

 a. 24 m/s2 b. zero c. 12 m/s2 d. 48 m/s2 e. 36 m/s2

ANS: A PTS: 2 DIF: Average

9.At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the velocity of the particle at t = 5.0 s?

 a. 15 m/s b. −15 m/s c. 30 m/s d. 0 e. −1.2 m/s

ANS: C PTS: 2 DIF: Average

10.At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the position of the particle at t = 5.0 s?

 a. 175 m b. 125 m c. 138 m d. 154 m e. 165 m

ANS: D PTS: 3 DIF: Challenging

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