Question 1

A boulder is dropped onto mud and plows into it a certain distance. If it hits with three times as much speed, the distance it plows into the mud will likely be

Accepted Answer

A) the same distance. 
B) twice as deep. 
C) three times as deep. 
D) more than three times as deep. 
A) the same distance. 
B) twice as deep. 
C) three times as deep. 
D) more than three times as deep.

Question 2

When you are in the way of a fast-moving object and can't get escape, you will suffer a smaller force if the collision time is

Accepted Answer

A) long. 
B) short. 
C) the same way either way. 
A) long. 
B) short. 
C) the same way either way.

Question 3

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, the contact time is about 10 times more than for a stiff-legged landing and the average force your body experiences is reduced by

Accepted Answer

A) less than 10 times. 
B) more than 10 times. 
C) about 10 times. 
A) less than 10 times. 
B) more than 10 times. 
C) about 10 times.

Question 4

In order to catch a fast-moving softball with your bare hand, you extend your hand forward just before the catch and then let the ball ride backward with your hand. Doing this reduces the catching force because the

Accepted Answer

A) relative velocity is less. 
B) relative velocity is more. 
C) time of catch is increased. 
D) time of the catch is decreased. 
E) none of the above 
A) relative velocity is less. 
B) relative velocity is more. 
C) time of catch is increased. 
D) time of the catch is decreased. 
E) none of the above

Question 5

Exert 1 N for a distance of 1 m in 1 s and you deliver a power of

Accepted Answer

A) 1 W. 
B) 2 W. 
C) 1/3 W. 
D) 3 W. 
E) none of the above 
A) 1 W. 
B) 2 W. 
C) 1/3 W. 
D) 3 W. 
E) none of the above

Question 6

A 30-kg girl and a 25-kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl's speed is

Accepted Answer

A) 0.45 m/s. 
B) 0.55 m/s. 
C) 0.83 m/s. 
D) 1.2 m/s. 
A) 0.45 m/s. 
B) 0.55 m/s. 
C) 0.83 m/s. 
D) 1.2 m/s.

Question 7

Consider gliders that slide friction-free along a horizontal air track. Glider A has a mass of 1 kg, a speed of 1 m/s, and collides with glider B, which has a mass of 5 kg and is at rest. If they stick upon collision the speed the combined gliders will be

Accepted Answer

A) 1/4 m/s. 
B) 1/5 m/s. 
C) 1/6 m/s. 
D) 1 m/s. 
E) none of the above 
A) 1/4 m/s. 
B) 1/5 m/s. 
C) 1/6 m/s. 
D) 1 m/s. 
E) none of the above

Question 8

A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is

Accepted Answer

A) greater. 
B) smaller. 
C) the same. 
A) greater. 
B) smaller. 
C) the same.

A boulder is dropped onto mud and plows into it a certain distance. If it hits with three times as much speed, the distance it plows into the mud will likely be

When you are in the way of a fast-moving object and can't get escape, you will suffer a smaller force if the collision time is

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, the contact time is about 10 times more than for a stiff-legged landing and the average force your body experiences is reduced by

In order to catch a fast-moving softball with your bare hand, you extend your hand forward just before the catch and then let the ball ride backward with your hand. Doing this reduces the catching force because the

Exert 1 N for a distance of 1 m in 1 s and you deliver a power of

A 30-kg girl and a 25-kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl's speed is

Consider gliders that slide friction-free along a horizontal air track. Glider A has a mass of 1 kg, a speed of 1 m/s, and collides with glider B, which has a mass of 5 kg and is at rest. If they stick upon collision the speed the combined gliders will be

A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is

Patterns of Motion and Equilibrium

Newtons Laws of Motion

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

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Exam 3: Momentum and Energy

A boulder is dropped onto mud and plows into it a certain distance. If it hits with three times as much speed, the distance it plows into the mud will likely be

When you are in the way of a fast-moving object and can't get escape, you will suffer a smaller force if the collision time is

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, the contact time is about 10 times more than for a stiff-legged landing and the average force your body experiences is reduced by

In order to catch a fast-moving softball with your bare hand, you extend your hand forward just before the catch and then let the ball ride backward with your hand. Doing this reduces the catching force because the

Exert 1 N for a distance of 1 m in 1 s and you deliver a power of

A 30-kg girl and a 25-kg boy face each other on friction-free roller blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girl's speed is

Consider gliders that slide friction-free along a horizontal air track. Glider A has a mass of 1 kg, a speed of 1 m/s, and collides with glider B, which has a mass of 5 kg and is at rest. If they stick upon collision the speed the combined gliders will be

A heavy truck and a small car rolling down a hill at the same speed are forced to stop in the same amount of time. Compared with the force to stop the car, the force needed to stop the truck is

Patterns of Motion and Equilibrium

Newtons Laws of Motion

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