Question 1

A 10-kg brick and a 1-kg book are dropped in a vacuum.The acceleration of the 10-kg brick is

Accepted Answer

A) the same as that of the 1-kg book. 
B) 5 times as much as for the 1-kg book. 
C) 10 times as much as for the 1-kg book. 
D) zero. 
A) the same as that of the 1-kg book. 
B) 5 times as much as for the 1-kg book. 
C) 10 times as much as for the 1-kg book. 
D) zero.

Question 2

When a boulder and a pebble are dropped,why does the pebble pick up speed as quickly as the boulder,even though less gravity acts on it? In other words,why do both accelerate equally?

Accepted Answer

Acceleration depends not only on the for

Question 3

After a ball tossed upward leaves your hand,the force of gravity on it

Accepted Answer

A) no longer acts. 
B) gradually diminishes. 
C) gradually increases. 
D) remains constant. 
E) changes direction. 
A) no longer acts. 
B) gradually diminishes. 
C) gradually increases. 
D) remains constant. 
E) changes direction.

Question 4

The force required to maintain an object at a constant velocity in free space is equal to

Accepted Answer

A) zero. 
B) the mass of the object. 
C) the weight of the object. 
D) the force required to stop it. 
A) zero. 
B) the mass of the object. 
C) the weight of the object. 
D) the force required to stop it.

Question 5

A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2.What is the mass of the car?

Accepted Answer

A) 500 kg 
B) 1000 kg 
C) 1500 kg 
D) 3000 kg 
E) none of these 
A) 500 kg 
B) 1000 kg 
C) 1500 kg 
D) 3000 kg 
E) none of these

Question 6

The net force on any object moving at constant velocity is

Accepted Answer

A) zero. 
B) 10 meters per second squared. 
C) equal to its weight. 
D) about half its weight. 
A) zero. 
B) 10 meters per second squared. 
C) equal to its weight. 
D) about half its weight.

Question 7

A car by itself is capable of a certain maximum acceleration.When it tows a twice-as-massive car,its maximum acceleration is

Accepted Answer

A) one-half. 
B) one-third. 
C) one-fourth. 
D) the same. 
E) none of these 
A) one-half. 
B) one-third. 
C) one-fourth. 
D) the same. 
E) none of these

Question 8

A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N.The acceleration of the block is

Accepted Answer

A) 1 m/s2. 
B) 2 m/s2. 
C) 5 m/s2. 
D) 10 m/s2. 
E) none of the above 
A) 1 m/s2. 
B) 2 m/s2. 
C) 5 m/s2. 
D) 10 m/s2. 
E) none of the above

Question 9

The emphasis of the orange-and-apple sequence in your text is

Accepted Answer

A) to define systems. 
B) that actions equal reactions. 
C) that forces produce accelerations. 
D) defining friction as a force. 
E) that mass is not a force. 
A) to define systems. 
B) that actions equal reactions. 
C) that forces produce accelerations. 
D) defining friction as a force. 
E) that mass is not a force.

Question 10

Whirl a rock at the end of a string and it follows a circular path.If the string breaks,the rock tends at first to

Accepted Answer

A) continue in a circular path. 
B) follow a straight-line path. 
C) spiral inward. 
D) fall straight downward. 
A) continue in a circular path. 
B) follow a straight-line path. 
C) spiral inward. 
D) fall straight downward.

Question 11

A commercial jet has a mass of 5000 kg.During takeoff the thrust of its engine is 10,000 N,producing an acceleration of

Accepted Answer

A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above 
A) 0.5 m/s2. 
B) 1 m/s2. 
C) 2 m/s2. 
D) 4 m/s2. 
E) none of the above

Question 12

What applied horizontal force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

Accepted Answer

A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of the above 
A) 600 N 
B) 1600 N 
C) 2000 N 
D) 2400 N 
E) none of the above

Question 13

Two people,one twice as massive as the other,attempt a tug-of-war with 12 m of rope on frictionless ice.After a brief time,they meet.The heavier person slides a distance of

Accepted Answer

A) 3 m. 
B) 4 m. 
C) 5 m. 
D) 6 m. 
A) 3 m. 
B) 4 m. 
C) 5 m. 
D) 6 m.

Question 14

A heavy rock and a light rock in free fall have the same acceleration because the

Accepted Answer

A) force due to gravity is the same on each. 
B) air resistance is always zero in free fall. 
C) inertia of each is the same. 
D) ratio of force to mass is the same. 
E) none of the above 
A) force due to gravity is the same on each. 
B) air resistance is always zero in free fall. 
C) inertia of each is the same. 
D) ratio of force to mass is the same. 
E) none of the above

Question 15

A physicist says that a car accelerating along a level road is being propelled by the road.Defend this statement.

Accepted Answer

It's true.The tires are made to rotate b

Question 16

A push on a 1-kg brick accelerates the brick.Neglecting friction,to equally accelerate a 10-kg brick requires the force to be

Accepted Answer

A) just as much. 
B) 10 times as much. 
C) 100 times as much. 
D) one-tenth as much. 
E) none of the above 
A) just as much. 
B) 10 times as much. 
C) 100 times as much. 
D) one-tenth as much. 
E) none of the above

Question 17

Lillian pulls on a 10-kg wagon with a constant force of 30 N.What is the wagon's acceleration?

Accepted Answer

A) 0.3 m/s2 
B) 3.0 m/s2 
C) 10 m/s2 
D) 30 m/s2 
E) 300 m/s2 
A) 0.3 m/s2 
B) 3.0 m/s2 
C) 10 m/s2 
D) 30 m/s2 
E) 300 m/s2

Question 18

A 10-kg brick and a 1-kg book are dropped in a vacuum.The force of gravity on the 10-kg brick is

Accepted Answer

A) the same as the force on the 1-kg book. 
B) 5 times as much as the force on the 1-kg book. 
C) 10 times as much as the force on the 1-kg book. 
D) zero. 
A) the same as the force on the 1-kg book. 
B) 5 times as much as the force on the 1-kg book. 
C) 10 times as much as the force on the 1-kg book. 
D) zero.

Question 19

Why will girls wearing gym shoes win in a tug-of-war against boys wearing socks while the activity occurs on a smooth floor?

Accepted Answer

In any tug of war,the tension on both en

Question 20

A ball is thrown vertically into the air.Because of air resistance,its time coming down compared with its time going up is

Accepted Answer

A) less. 
B) the same. 
C) more. 
A) less. 
B) the same. 
C) more.

Exam 2: Newtons Laws of Motion

A 10-kg brick and a 1-kg book are dropped in a vacuum.The acceleration of the 10-kg brick is

When a boulder and a pebble are dropped,why does the pebble pick up speed as quickly as the boulder,even though less gravity acts on it? In other words,why do both accelerate equally?

After a ball tossed upward leaves your hand,the force of gravity on it

The force required to maintain an object at a constant velocity in free space is equal to

A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s2.What is the mass of the car?

The net force on any object moving at constant velocity is

A car by itself is capable of a certain maximum acceleration.When it tows a twice-as-massive car,its maximum acceleration is

A 10-kg block is pushed across a horizontal surface with a horizontal force of 20 N against a friction force of 10 N.The acceleration of the block is

The emphasis of the orange-and-apple sequence in your text is

Whirl a rock at the end of a string and it follows a circular path.If the string breaks,the rock tends at first to

A commercial jet has a mass of 5000 kg.During takeoff the thrust of its engine is 10,000 N,producing an acceleration of

What applied horizontal force will accelerate a 400-kg crate at 1 m/s2 across a factory floor against a friction force half its weight?

Two people,one twice as massive as the other,attempt a tug-of-war with 12 m of rope on frictionless ice.After a brief time,they meet.The heavier person slides a distance of

A heavy rock and a light rock in free fall have the same acceleration because the

A physicist says that a car accelerating along a level road is being propelled by the road.Defend this statement.

A push on a 1-kg brick accelerates the brick.Neglecting friction,to equally accelerate a 10-kg brick requires the force to be

Lillian pulls on a 10-kg wagon with a constant force of 30 N.What is the wagon's acceleration?

A 10-kg brick and a 1-kg book are dropped in a vacuum.The force of gravity on the 10-kg brick is

Why will girls wearing gym shoes win in a tug-of-war against boys wearing socks while the activity occurs on a smooth floor?

A ball is thrown vertically into the air.Because of air resistance,its time coming down compared with its time going up is

Patterns of Motion and Equilibrium

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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A tow truck exerts a force of 3000 N on a car that accelerates at 2 m/s².What is the mass of the car?

What applied horizontal force will accelerate a 400-kg crate at 1 m/s²across a factory floor against a friction force half its weight?