## Test Bank For Physics of Everyday Phenomena 9Th edition By W, Thomas

*The Physics of Everyday Phenomena, 9e *(Griffith)

**Chapter 2 Describing Motion**

1) An auto, starting from rest, undergoes constant acceleration and covers a distance of 1250 meters. The final speed of the auto is 50 meters/sec. How long does it take the car to cover the 1250 meters?

A) 30 s

B) 50 s

C) 0.05 s

D) 72,000 s

Answer: B

Difficulty: 3 Hard

Topic: Uniform Acceleration

Chapter: 02 Describing Motion

Type: Numerical

Accessibility: Keyboard Navigation

2) A car traveling at constant speed

A) does not turn.

B) travels more distance in a second the longer the car travels.

C) can change direction.

D) cannot be going uphill.

Answer: C

Difficulty: 1 Easy

Topic: Average and Instantaneous Speed

Chapter: 02 Describing Motion

Type: Conceptual

Accessibility: Keyboard Navigation

3) An auto moves 10 meters in the first second of travel, 15 more meters in the next second, and 20 more meters during the third second. The acceleration of the auto is

A) 3.33 m/s2.

B) 9.8 m/s2.

C) 30 m/s2.

D) 5 m/s2.

E) zero m/s2.

Answer: D

Difficulty: 1 Easy

Topic: Acceleration

Chapter: 02 Describing Motion

Type: Conceptual

Accessibility: Keyboard Navigation

4) A quantity that is a measure of how the velocity of a body changes with time is

A) distance.

B) speed.

C) acceleration.

D) time.

Answer: C

Difficulty: 1 Easy

Topic: Acceleration

Chapter: 02 Describing Motion

Type: Conceptual; Definition

Accessibility: Keyboard Navigation

5) The following quantities relate to the rate of change of position. Which pair will always have the same magnitude?

A) Average speed and average velocity

B) Average speed and instantaneous speed

C) Average velocity and instantaneous velocity

D) Instantaneous speed and instantaneous velocity

Answer: D

Difficulty: 2 Medium

Topic: Average and Instantaneous Speed; Velocity

Chapter: 02 Describing Motion

Type: Conceptual

Accessibility: Keyboard Navigation

6) The acceleration of a body cannot be zero at a point where

A) the instantaneous velocity is zero.

B) the instantaneous velocity is positive but decreasing.

C) the average velocity is positive.

D) None of these choices are correct

Answer: B

Difficulty: 3 Hard

Topic: Acceleration

Chapter: 02 Describing Motion

Type: Conceptual

Accessibility: Keyboard Navigation

7) A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.8 m in a time of 4.0 s. The average speed of the ball is

A) 3.2 m/s.

B) 1.0 m/s.

C) 0.2 m/s.

D) 2.0 m/s.

Answer: C

Difficulty: 1 Easy

Topic: Average and Instantaneous Speed

Chapter: 02 Describing Motion

Type: Numerical

Accessibility: Keyboard Navigation

8) A student releases a ball from rest on an inclined plane and measures that it travels a distance of 0.5 m in a time of 2.0 s. The acceleration of the ball is

A) 0.125 m/s2.

B) 0.25 m/s2.

C) 0.5 m/s2.

D) 1.0 m/s2.

Answer: B

Difficulty: 1 Easy

Topic: Average and Instantaneous Speed; Acceleration

Chapter: 02 Describing Motion

Type: Numerical

Accessibility: Keyboard Navigation

9) A car travels a distance of 100 km. For the first 30 minutes it is driven at a constant speed of 80 km/hr. The motor begins to vibrate and the driver reduces the speed to 40 km/hr for the rest of the trip. The average speed for the entire trip is

A) 60.0 km/hr.

B) 53.3 km/hr.

C) 50.0 km/hr.

D) 47.5 km/hr.

E) 40.0 km/hr.

Answer: C

Difficulty: 3 Hard

Topic: Average and Instantaneous Speed

Chapter: 02 Describing Motion

Type: Numerical

Accessibility: Keyboard Navigation

10) Initially you are driving at 55 mi/hr. If you come to rest in 7.5 s while traveling 450 ft, what is your average speed while stopping? (There are 5280 ft in one mi.)

A) 55 mi/hr

B) 0.016 ft/s

C) 120 ft/s

D) 60 ft/s

Answer: D

Difficulty: 1 Easy

Topic: Average and Instantaneous Speed

Chapter: 02 Describing Motion

Type: Numerical

Accessibility: Keyboard Navigation

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