Question 1

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 2

When you step off a bus moving at 10 m/s, your horizontal speed when you meet the ground is

Accepted Answer

A) zero. 
B) less than 10 m/s but greater than zero. 
C) about 10 m/s. 
D) greater than 10 m/s. 
A) zero. 
B) less than 10 m/s but greater than zero. 
C) about 10 m/s. 
D) greater than 10 m/s.

Question 3

A ball is thrown upward and caught when it comes back down. When air resistance affects the ball, compared with the initial upward speed, the speed when caught is

Accepted Answer

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

Question 4

A car has a certain maximum acceleration. When it tows another 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 the above 
A) one-half. 
B) one-third. 
C) one-fourth. 
D) the same. 
E) none of the above

Question 5

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

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 6

A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The vehicle to undergo the greatest change in velocity will be the

Accepted Answer

A) Mini Cooper. 
B) Mack truck. 
C) same 
A) Mini Cooper. 
B) Mack truck. 
C) same

Question 7

A math book and a science book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is

Accepted Answer

A) zero. 
B) g/2. 
C) g. 
D) a value between zero and g. 
E) a value that could be greater than g. 
A) zero. 
B) g/2. 
C) g. 
D) a value between zero and g. 
E) a value that could be greater than g.

Question 8

A 10-kg block is pushed across a friction-free horizontal surface with a horizontal force of 20 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

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. The acceleration of the jet when taking off is

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 10

A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration

Accepted Answer

A) increases. 
B) decreases. 
C) remains unchanged regardless of air resistance. 
A) increases. 
B) decreases. 
C) remains unchanged regardless of air resistance.

Question 11

When a rock thrown straight up reaches the exact top of its path, its velocity is

Accepted Answer

A) zero and its acceleration is zero. 
B) zero and its acceleration is 10 m/s2. 
C) about 10 m/s and its acceleration is zero. 
D) about 10 m/s and its acceleration is 10 m/s2. 
A) zero and its acceleration is zero. 
B) zero and its acceleration is 10 m/s2. 
C) about 10 m/s and its acceleration is zero. 
D) about 10 m/s and its acceleration is 10 m/s2.

Question 12

A particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a head-on second force of 10 N in the opposite direction. The particle with both forces acting on it

Accepted Answer

A) is brought to a rapid halt. 
B) decelerates gradually to a halt. 
C) continues at the speed it had when it encountered the second force. 
D) theoretically tends to accelerate toward the speed of light. 
E) none of the above 
A) is brought to a rapid halt. 
B) decelerates gradually to a halt. 
C) continues at the speed it had when it encountered the second force. 
D) theoretically tends to accelerate toward the speed of light. 
E) none of the above

Question 13

The attraction of a person's body toward Earth is called weight. The reaction to this force is

Accepted Answer

A) the person's body pushing against Earth's surface. 
B) Earth's surface pushing against the person's body. 
C) the person's body pulling on Earth. 
D) none of the above 
A) the person's body pushing against Earth's surface. 
B) Earth's surface pushing against the person's body. 
C) the person's body pulling on Earth. 
D) none of the above

Question 14

A car traveling at 100 km/h strikes an unfortunate bug that splatters on the windshield. The force of impact is greater on the

Accepted Answer

A) bug. 
B) car. 
C) same for both 
A) bug. 
B) car. 
C) same for both

Question 15

A ball tossed vertically upward reaches its highest point and then falls back to its starting point. During this up-and-down motion the acceleration of the ball is always

Accepted Answer

A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward. 
A) in the direction of motion. 
B) opposite its velocity. 
C) directed upward. 
D) directed downward.

Question 16

A falling object that has reached its terminal speed continues to gain

Accepted Answer

A) acceleration. 
B) speed. 
C) both 
D) neither 
A) acceleration. 
B) speed. 
C) both 
D) neither

Question 17

If you drop an object, it will accelerate downward at a rate of 10 m/s2. If you instead throw it downward, its acceleration (in the absence of air resistance)will be

Accepted Answer

A) less than 10 m/s2. 
B) 10 m/s2. 
C) greater than 10 m/s2. 
A) less than 10 m/s2. 
B) 10 m/s2. 
C) greater than 10 m/s2.

Question 18

A 10-N falling object encounters 10 N of air resistance. The net force on it is

Accepted Answer

A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N. 
E) none of the above 
A) 0 N. 
B) 4 N. 
C) 6 N. 
D) 10 N. 
E) none of the above

Question 19

A heavy object and a light object in a vacuum are dropped at the same time from rest. The heavier object reaches the ground

Accepted Answer

A) sooner than the lighter object. 
B) at the same time as the lighter object. 
C) later than the lighter object. 
A) sooner than the lighter object. 
B) at the same time as the lighter object. 
C) later than the lighter object.

Question 20

If the mass of an object does not change, a constant net force on the object produces constant

Accepted Answer

A) velocity. 
B) acceleration. 
C) both 
D) none of the above 
A) velocity. 
B) acceleration. 
C) both 
D) none of the above

Exam 2: Newtons Laws of Motion

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

When you step off a bus moving at 10 m/s, your horizontal speed when you meet the ground is

A ball is thrown upward and caught when it comes back down. When air resistance affects the ball, compared with the initial upward speed, the speed when caught is

A car has a certain maximum acceleration. When it tows another twice-as-massive car its maximum acceleration is

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

A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The vehicle to undergo the greatest change in velocity will be the

A math book and a science book are tied together with a length of string. With the string taut, one book is pushed off the edge of a table. As it falls, the other book is dragged horizontally across the table surface. With no friction, acceleration of the books is

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

A jumbo jet has a mass of 100,000 kg. The thrust for each of its four engines is 50,000 N. The acceleration of the jet when taking off is

A skydiver jumps from a high-flying plane. As her velocity of fall increases, her acceleration

When a rock thrown straight up reaches the exact top of its path, its velocity is

A particle is being accelerated through space by a 10-N force. Suddenly the particle encounters a head-on second force of 10 N in the opposite direction. The particle with both forces acting on it

The attraction of a person's body toward Earth is called weight. The reaction to this force is

A car traveling at 100 km/h strikes an unfortunate bug that splatters on the windshield. The force of impact is greater on the

A ball tossed vertically upward reaches its highest point and then falls back to its starting point. During this up-and-down motion the acceleration of the ball is always

A falling object that has reached its terminal speed continues to gain

If you drop an object, it will accelerate downward at a rate of 10 m/s2. If you instead throw it downward, its acceleration (in the absence of air resistance)will be

A 10-N falling object encounters 10 N of air resistance. The net force on it is

A heavy object and a light object in a vacuum are dropped at the same time from rest. The heavier object reaches the ground

If the mass of an object does not change, a constant net force on the object produces constant

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 Timereading 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

Filters

If you drop an object, it will accelerate downward at a rate of 10 m/s². If you instead throw it downward, its acceleration (in the absence of air resistance)will be