Question 1

A golf ball and a ping-pong ball are dropped in a vacuum chamber.When they have fallen halfway down, they have the same

Accepted Answer

A) speed. 
B) potential energy. 
C) kinetic energy. 
D) rest energy. 
A) speed. 
B) potential energy. 
C) kinetic energy. 
D) rest energy.

Question 2

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

Accepted Answer

A) 80 kgm/s. 
B) 2000 kgm/s. 
C) 5000 kgm/s. 
D) 19,600 kgm/s. 
A) 80 kgm/s. 
B) 2000 kgm/s. 
C) 5000 kgm/s. 
D) 19,600 kgm/s.

Question 3

A spinning skater whose arms are at her sides then stretches out her arms horizontally.

Accepted Answer

A) She continues to spin at the same rate. 
B) She spins more rapidly. 
C) She spins more slowly. 
D) Any of the choices could be correct, depending on how heavy her arms are. 
A) She continues to spin at the same rate. 
B) She spins more rapidly. 
C) She spins more slowly. 
D) Any of the choices could be correct, depending on how heavy her arms are.

Question 4

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

Accepted Answer

A) 1.2 m/s. 
B) 3.4 m/s. 
C) 34 m/s. 
D) 107 m/s. 
A) 1.2 m/s. 
B) 3.4 m/s. 
C) 34 m/s. 
D) 107 m/s.

Question 5

A moving object must have which one or more of the following?

Accepted Answer

A) potential energy 
B) kinetic energy 
C) rest energy 
D) momentum 
E) Both B, C, and D 
A) potential energy 
B) kinetic energy 
C) rest energy 
D) momentum 
E) Both B, C, and D

Question 6

On a molecular level heat is

Accepted Answer

A) kinetic energy. 
B) potential energy. 
C) mass energy. 
D) momentum. 
A) kinetic energy. 
B) potential energy. 
C) mass energy. 
D) momentum.

Question 7

Which of the following is not a unit of work?

Accepted Answer

A) newton-meter 
B) joule 
C) kilogram-meter 
D) watt-hour 
A) newton-meter 
B) joule 
C) kilogram-meter 
D) watt-hour

A golf ball and a ping-pong ball are dropped in a vacuum chamber.When they have fallen halfway down, they have the same

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

A spinning skater whose arms are at her sides then stretches out her arms horizontally.

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

A moving object must have which one or more of the following?

On a molecular level heat is

Which of the following is not a unit of work?

The Scientific Method

Motion

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters

Exam 3: Energy

A golf ball and a ping-pong ball are dropped in a vacuum chamber.When they have fallen halfway down, they have the same

The linear momentum of a 400-kg giraffe galloping at 5 m/s is

A spinning skater whose arms are at her sides then stretches out her arms horizontally.

The 2.5-kg head of an ax exerts a force of 80 kN as it penetrates 18 mm into the truck of a tree.The speed of the ax head when it strikes the tree is

A moving object must have which one or more of the following?

On a molecular level heat is

Which of the following is not a unit of work?

The Scientific Method

Motion

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

Universe

Filters