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

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 v_x = (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 = 15e^−2t 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.V_x 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