Question 1

When you push a crate across a level floor at constant velocity,friction between the crate and the floor is

Accepted Answer

A) less than your pushing force. 
B) the same amount as your pushing force. 
C) more than your pushing force. 
D) none of the above 
A) less than your pushing force. 
B) the same amount as your pushing force. 
C) more than your pushing force. 
D) none of the above

Question 2

You're driving in a car at 50 km/h and bump into a car ahead traveling at 48 km/h in the same direction.The speed of impact is

Accepted Answer

A) zero. 
B) 2 km/h. 
C) 48 km/h. 
D) 50 km/h. 
E) 98 km/h. 
A) zero. 
B) 2 km/h. 
C) 48 km/h. 
D) 50 km/h. 
E) 98 km/h.

Question 3

The average speed of Daisy running a distance of 2 km in a time of one-half hour is

Accepted Answer

A) 1 km/h. 
B) 2 km/h. 
C) 4 km/h. 
D) more than 4 km/h. 
A) 1 km/h. 
B) 2 km/h. 
C) 4 km/h. 
D) more than 4 km/h.

Question 4

During each second of free fall,the speed of an object

Accepted Answer

A) increases by the same amount. 
B) changes by increasing amounts each second. 
C) remains constant. 
D) doubles each second. 
A) increases by the same amount. 
B) changes by increasing amounts each second. 
C) remains constant. 
D) doubles each second.

Question 5

An object is pulled with two forces,10 N northward and 15 N southward.The magnitude of the net force is

Accepted Answer

A) 0 N. 
B) 5 N. 
C) 10 N. 
D) 15 N. 
E) none of the above 
A) 0 N. 
B) 5 N. 
C) 10 N. 
D) 15 N. 
E) none of the above

Question 6

If a freely-falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2,then its speed reading would increase each second by

Accepted Answer

A) 10 m/s. 
B) 20 m/s. 
C) 30 m/s. 
D) 40 m/s. 
E) depends on its initial speed 
A) 10 m/s. 
B) 20 m/s. 
C) 30 m/s. 
D) 40 m/s. 
E) depends on its initial speed

Question 7

Daisy weighs 120 N and carries Trixie who weighs 40 N on her back.The support force on Daisy's feet is

Accepted Answer

A) 40 N. 
B) 120 N. 
C) 160 N. 
D) more than 160 N. 
A) 40 N. 
B) 120 N. 
C) 160 N. 
D) more than 160 N.

Question 8

Ten seconds after starting from rest,a freely-falling baseball will have a speed of about

Accepted Answer

A) 10 m/s. 
B) 50 m/s. 
C) 100 m/s. 
D) 500 m/s. 
E) more than 500 m/s. 
A) 10 m/s. 
B) 50 m/s. 
C) 100 m/s. 
D) 500 m/s. 
E) more than 500 m/s.

Question 9

If you toss a ball straight upward at 40 m/s,with no air resistance it returns to you at a speed of

Accepted Answer

A) zero. 
B) 10 m/s. 
C) 40 m/s. 
D) more than 40 m/s. 
A) zero. 
B) 10 m/s. 
C) 40 m/s. 
D) more than 40 m/s.

Question 10

The acceleration of a cart rolling down an inclined plane (a ramp)

Accepted Answer

A) is approximately constant. 
B) increases with time. 
C) decreases with time. 
A) is approximately constant. 
B) increases with time. 
C) decreases with time.

Question 11

In contrast to Aristotle's way of explaining nature,Galileo relied on

Accepted Answer

A) experiment. 
B) logic. 
C) patterns. 
D) mathematics. 
A) experiment. 
B) logic. 
C) patterns. 
D) mathematics.

Question 12

When a ball increases in speed by the same amount each second,its acceleration

Accepted Answer

A) also increases each second. 
B) decreases each second. 
C) is constant. 
D) varies. 
A) also increases each second. 
B) decreases each second. 
C) is constant. 
D) varies.

Question 13

A glance at the speedometer on your vehicle will tell you your

Accepted Answer

A) average speed. 
B) instantaneous speed. 
C) overall speed. 
D) acceleration. 
A) average speed. 
B) instantaneous speed. 
C) overall speed. 
D) acceleration.

Question 14

When a 10-kg block is simultaneously pushed toward the east with 20 N and toward the west with 15 N,the combination of these forces on the block is

Accepted Answer

A) 5 N west. 
B) 5 N east. 
C) 35 N east. 
D) 35 N west. 
A) 5 N west. 
B) 5 N east. 
C) 35 N east. 
D) 35 N west.

Question 15

The resistive force of friction occurs for

Accepted Answer

A) solids. 
B) liquids. 
C) gases. 
D) all of the above 
A) solids. 
B) liquids. 
C) gases. 
D) all of the above

Question 16

The acceleration of a vertically-thrown ball at the top of its path is

Accepted Answer

A) zero. 
B) 10 m/s2. 
C) between zero and 10 m/s2. 
D) dependent on the mass of the ball. 
A) zero. 
B) 10 m/s2. 
C) between zero and 10 m/s2. 
D) dependent on the mass of the ball.

Question 17

A good tutor will be correct in saying that velocity and acceleration are

Accepted Answer

A) the same concept,but expressed differently. 
B) rates of one another. 
C) expressions for changing speeds. 
D) different concepts. 
A) the same concept,but expressed differently. 
B) rates of one another. 
C) expressions for changing speeds. 
D) different concepts.

Question 18

A 10-kg mass at Earth's surface weighs about

Accepted Answer

A) 1 N. 
B) 5 N. 
C) 10 N. 
D) 100 N. 
E) 1000 N. 
A) 1 N. 
B) 5 N. 
C) 10 N. 
D) 100 N. 
E) 1000 N.

Question 19

A heavy ball hangs by a string,with a second string attached to its bottom (Figure 1.7 in your text).A slow pull on the bottom string breaks the

Accepted Answer

A) top string. 
B) bottom string. 
C) top or bottom string equally likely. 
D) none of the above 
A) top string. 
B) bottom string. 
C) top or bottom string equally likely. 
D) none of the above

Question 20

On the surface of the Moon where acceleration due to gravity is less,a person's hang time would be

Accepted Answer

A) longer. 
B) shorter. 
C) the same as on Earth. 
A) longer. 
B) shorter. 
C) the same as on Earth.

Exam 1: Patterns of Motion and Equilibrium

When you push a crate across a level floor at constant velocity,friction between the crate and the floor is

You're driving in a car at 50 km/h and bump into a car ahead traveling at 48 km/h in the same direction.The speed of impact is

The average speed of Daisy running a distance of 2 km in a time of one-half hour is

During each second of free fall,the speed of an object

An object is pulled with two forces,10 N northward and 15 N southward.The magnitude of the net force is

If a freely-falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s2,then its speed reading would increase each second by

Daisy weighs 120 N and carries Trixie who weighs 40 N on her back.The support force on Daisy's feet is

Ten seconds after starting from rest,a freely-falling baseball will have a speed of about

If you toss a ball straight upward at 40 m/s,with no air resistance it returns to you at a speed of

The acceleration of a cart rolling down an inclined plane (a ramp)

In contrast to Aristotle's way of explaining nature,Galileo relied on

When a ball increases in speed by the same amount each second,its acceleration

A glance at the speedometer on your vehicle will tell you your

When a 10-kg block is simultaneously pushed toward the east with 20 N and toward the west with 15 N,the combination of these forces on the block is

The resistive force of friction occurs for

The acceleration of a vertically-thrown ball at the top of its path is

A good tutor will be correct in saying that velocity and acceleration are

A 10-kg mass at Earth's surface weighs about

A heavy ball hangs by a string,with a second string attached to its bottom (Figure 1.7 in your text).A slow pull on the bottom string breaks the

On the surface of the Moon where acceleration due to gravity is less,a person's hang time would be

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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If a freely-falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s²,then its speed reading would increase each second by