Question 1

When an astronaut experiences weightlessness in space, their mass is

Accepted Answer

A)  zero. 
B)  the same as on Earth. 
C)  double than on Earth. 
D)  becoming lesser and lesser as s/he is going higher. 
A)  zero. 
B)  the same as on Earth. 
C)  double than on Earth. 
D)  becoming lesser and lesser as s/he is going higher. B

Question 2

A satellite is moved from a low orbit to one that is twice as far from Earth.The force of gravity is ____.

Accepted Answer

A)  unchanged 
B)  decreased by a factor of 2 
C)  decreased by a factor of 4 
D)  There is no gravity in space. 
E)  increased by a factor of 2 
A)  unchanged 
B)  decreased by a factor of 2 
C)  decreased by a factor of 4 
D)  There is no gravity in space. 
E)  increased by a factor of 2 C

Question 3

If you see a body in space that is not moving in a straight line at constant speed, what can you say about it?

Accepted Answer

A)  It must be an artificial satellite. 
B)  There must be a net force acting on it. 
C)  It is not subject to any outside forces. 
D)  None of these choices is correct. 
A)  It must be an artificial satellite. 
B)  There must be a net force acting on it. 
C)  It is not subject to any outside forces. 
D)  None of these choices is correct. B

Question 4

What does escape velocity measure?

Accepted Answer

A)  the gravitational attraction at a planet's surface 
B)  how fast an object needs to go to escape a planet's gravity 
C)  how far away an object needs to be to escape a planet's gravity 
D)  how fast an object needs to go to escape hostile space aliens 
A)  the gravitational attraction at a planet's surface 
B)  how fast an object needs to go to escape a planet's gravity 
C)  how far away an object needs to be to escape a planet's gravity 
D)  how fast an object needs to go to escape hostile space aliens

Question 5

Larger planets (higher mass) in the solar system have higher orbital speeds because they are attracted more strongly by the Sun.

Accepted Answer

A) True 
 B)False

Question 6

If you double the distance between two bodies, the force of gravity between them would

Accepted Answer

A)  double. 
B)  become four times as strong. 
C)  decrease by one half. 
D)  decrease by one fourth. 
A)  double. 
B)  become four times as strong. 
C)  decrease by one half. 
D)  decrease by one fourth.

Question 7

Galileo hypothesized that a ball rolling along a flat surface with no change in speed would _________.

Accepted Answer

A)  have no net force acting on it 
B)  accelerate, depending on its mass 
C)  have a net force acting on it, upward from the surface 
D)  slow down as it rolled down a slope 
E)  speed up as it rolled up a slope 
A)  have no net force acting on it 
B)  accelerate, depending on its mass 
C)  have a net force acting on it, upward from the surface 
D)  slow down as it rolled down a slope 
E)  speed up as it rolled up a slope

Question 8

If the Moon is suddenly and inexplicably moved to four times its current distance from Earth, its orbital speed ______________________________________.

Accepted Answer

A)  increases by a factor of 2 
B)  increases by a factor of 4 
C)  decreases by a factor of 2 
D)  decreases by a factor of 4 
E)  is unchanged due to its low mass 
A)  increases by a factor of 2 
B)  increases by a factor of 4 
C)  decreases by a factor of 2 
D)  decreases by a factor of 4 
E)  is unchanged due to its low mass

Question 9

Why does a golf ball hit on the Moon travel farther than one hit on Earth? (Neglect air resistance and bad golfers.)

Accepted Answer

A)  The surface gravity is lower on the Moon, so the acceleration of gravity is lower. 
B)  The mass of the ball is lower on the Moon, so it is accelerated more easily there. 
C)  The surface gravity is lower on the Moon, so the golf club can be accelerated more easily there. 
D)  The Moon is physically smaller than Earth, so the golf ball only looks like it travels farther. 
A)  The surface gravity is lower on the Moon, so the acceleration of gravity is lower. 
B)  The mass of the ball is lower on the Moon, so it is accelerated more easily there. 
C)  The surface gravity is lower on the Moon, so the golf club can be accelerated more easily there. 
D)  The Moon is physically smaller than Earth, so the golf ball only looks like it travels farther.

Question 10

If your mass is 60 kilograms on Earth, what is it on the Moon?

Accepted Answer

A)  0 kilograms, because the Moon has no gravity 
B)  60 kilograms, because mass does not depend on gravity 
C)  120 kilograms, because the Moon's gravity is greater than Earth's 
D)  360 kilograms, because the Moon is a spherical object 
A)  0 kilograms, because the Moon has no gravity 
B)  60 kilograms, because mass does not depend on gravity 
C)  120 kilograms, because the Moon's gravity is greater than Earth's 
D)  360 kilograms, because the Moon is a spherical object

Question 11

What do we call the tendency of a body at rest to remain at rest or a body in motion to remain in motion?

Accepted Answer

A)  gravity 
B)  the "action-reaction" law 
C)  the tendency of a person to stay in bed in the morning 
D)  inertia 
A)  gravity 
B)  the "action-reaction" law 
C)  the tendency of a person to stay in bed in the morning 
D)  inertia

Question 12

The reason Earth's moon does not fall into Earth is because it orbits beyond Earth's gravitational pull.

Accepted Answer

A) True 
 B)False

Question 13

Astronomers can determine the mass of the Sun by applying Newton's modification of Kepler's Third law.

Accepted Answer

A) True 
 B)False

Question 14

A diver in midair is pulled toward the pool below by the force of gravity from Earth. Earth experiences an upward force from the diver that ____.

Accepted Answer

A)  is equal to the force on the diver by Earth 
B)  is less than the force on the diver by Earth 
C)  is greater than the force on the diver by Earth 
D)  There is no upward force by the diver on Earth 
E)  There is insufficient information to determine the gravitational pull on Earth by the diver 
A)  is equal to the force on the diver by Earth 
B)  is less than the force on the diver by Earth 
C)  is greater than the force on the diver by Earth 
D)  There is no upward force by the diver on Earth 
E)  There is insufficient information to determine the gravitational pull on Earth by the diver

Question 15

If an object's mass (M) is doubled, the gravitational force between it and other objects will be

Accepted Answer

A)  increased by a factor of 2. 
B)  increased by a factor of 4. 
C)  decreased by a factor of 2. 
D)  decreased by a factor of 4. 
A)  increased by a factor of 2. 
B)  increased by a factor of 4. 
C)  decreased by a factor of 2. 
D)  decreased by a factor of 4.

Question 16

In your office, you have a rolling chair and a rolling filing cabinet. The chair weighs 10 pounds, and the filing cabinet weighs 50 pounds (it's partly full). If you push both of them away with about the same strength

Accepted Answer

A)  the chair will accelerate about 25 times as much as the cabinet. 
B)  the cabinet will accelerate about 25 times as much as the chair. 
C)  the chair will accelerate about 5 times as much as the cabinet. 
D)  the cabinet will accelerate about 5 times as much as the chair. 
E)  both will accelerate about the same. 
A)  the chair will accelerate about 25 times as much as the cabinet. 
B)  the cabinet will accelerate about 25 times as much as the chair. 
C)  the chair will accelerate about 5 times as much as the cabinet. 
D)  the cabinet will accelerate about 5 times as much as the chair. 
E)  both will accelerate about the same.

Question 17

Earth's radius at the equator is larger than that at the poles. Where is Earth's surface gravity more?

Accepted Answer

A)  at the equator 
B)  at the North and South Poles 
C)  it is the same everywhere 
D)  at the top of Mount Everest 
A)  at the equator 
B)  at the North and South Poles 
C)  it is the same everywhere 
D)  at the top of Mount Everest

Question 18

When a bus makes a sudden stop the passengers lurch forward as a consequence of ____ law.

Accepted Answer

A)  Newton's First 
B)  Kepler's Third 
C)  Newton's Third 
D)  Kepler's First 
A)  Newton's First 
B)  Kepler's Third 
C)  Newton's Third 
D)  Kepler's First

Question 19

Which statement is true about Newton's First law of motion?

Accepted Answer

A)  A body at rest stays at rest unless a force is applied to it. 
B)  A body in motion stays in motion unless a force is applied to it. 
C)  A body in motion has the tendency to come to a stop eventually. 
D)  A body at rest stays at rest unless a force is applied to it and a body in motion has the tendency to come to a stop eventually. 
E)  A body at rest stays at rest unless a force is applied to it and a body in motion stays in motion unless a force is applied to it. 
A)  A body at rest stays at rest unless a force is applied to it. 
B)  A body in motion stays in motion unless a force is applied to it. 
C)  A body in motion has the tendency to come to a stop eventually. 
D)  A body at rest stays at rest unless a force is applied to it and a body in motion has the tendency to come to a stop eventually. 
E)  A body at rest stays at rest unless a force is applied to it and a body in motion stays in motion unless a force is applied to it.

Question 20

Which of the following objects is obeying Newton's laws of motion?

Accepted Answer

A)  a sleeping cat 
B)  a satellite orbiting Earth 
C)  a runner racing around a track 
D)  a skydiver falling under the force of gravity 
E)  All of these choices are correct. 
A)  a sleeping cat 
B)  a satellite orbiting Earth 
C)  a runner racing around a track 
D)  a skydiver falling under the force of gravity 
E)  All of these choices are correct.

When an astronaut experiences weightlessness in space, their mass is

A satellite is moved from a low orbit to one that is twice as far from Earth.The force of gravity is ____.

If you see a body in space that is not moving in a straight line at constant speed, what can you say about it?

What does escape velocity measure?

Larger planets (higher mass) in the solar system have higher orbital speeds because they are attracted more strongly by the Sun.

If you double the distance between two bodies, the force of gravity between them would

Galileo hypothesized that a ball rolling along a flat surface with no change in speed would _________.

If the Moon is suddenly and inexplicably moved to four times its current distance from Earth, its orbital speed ______________________________________.

Why does a golf ball hit on the Moon travel farther than one hit on Earth? (Neglect air resistance and bad golfers.)

If your mass is 60 kilograms on Earth, what is it on the Moon?

What do we call the tendency of a body at rest to remain at rest or a body in motion to remain in motion?

The reason Earth's moon does not fall into Earth is because it orbits beyond Earth's gravitational pull.

Astronomers can determine the mass of the Sun by applying Newton's modification of Kepler's Third law.

A diver in midair is pulled toward the pool below by the force of gravity from Earth. Earth experiences an upward force from the diver that ____.

If an object's mass (M) is doubled, the gravitational force between it and other objects will be

In your office, you have a rolling chair and a rolling filing cabinet. The chair weighs 10 pounds, and the filing cabinet weighs 50 pounds (it's partly full). If you push both of them away with about the same strength

Earth's radius at the equator is larger than that at the poles. Where is Earth's surface gravity more?

When a bus makes a sudden stop the passengers lurch forward as a consequence of ____ law.

Which statement is true about Newton's First law of motion?

Which of the following objects is obeying Newton's laws of motion?

The Cycles of the Sky

The Rise of Astronomy

Light and Atoms

Telescopes

Earth

The Moon

Survey of Solar Systems

The Terrestrial Planets

The Outer Planets

Small Bodies Orbiting the Sun

The Sun, Our Star

Measuring the Properties of Stars

Stellar Evolution

Stellar Remnants: White Dwarfs, Neutron Stars, and Black Holes

The Milky Way Galaxy

Galaxies

Cosmology

Filters

Exam 3: Gravity and Motion

When an astronaut experiences weightlessness in space, their mass is

A satellite is moved from a low orbit to one that is twice as far from Earth.The force of gravity is ____.

If you see a body in space that is not moving in a straight line at constant speed, what can you say about it?

What does escape velocity measure?

Larger planets (higher mass) in the solar system have higher orbital speeds because they are attracted more strongly by the Sun.

If you double the distance between two bodies, the force of gravity between them would

Galileo hypothesized that a ball rolling along a flat surface with no change in speed would _________.

If the Moon is suddenly and inexplicably moved to four times its current distance from Earth, its orbital speed ______________________________________.

Why does a golf ball hit on the Moon travel farther than one hit on Earth? (Neglect air resistance and bad golfers.)

If your mass is 60 kilograms on Earth, what is it on the Moon?

What do we call the tendency of a body at rest to remain at rest or a body in motion to remain in motion?

The reason Earth's moon does not fall into Earth is because it orbits beyond Earth's gravitational pull.

Astronomers can determine the mass of the Sun by applying Newton's modification of Kepler's Third law.

A diver in midair is pulled toward the pool below by the force of gravity from Earth. Earth experiences an upward force from the diver that ____.

If an object's mass (M) is doubled, the gravitational force between it and other objects will be

In your office, you have a rolling chair and a rolling filing cabinet. The chair weighs 10 pounds, and the filing cabinet weighs 50 pounds (it's partly full). If you push both of them away with about the same strength

Earth's radius at the equator is larger than that at the poles. Where is Earth's surface gravity more?

When a bus makes a sudden stop the passengers lurch forward as a consequence of ____ law.

Which statement is true about Newton's First law of motion?

Which of the following objects is obeying Newton's laws of motion?

The Cycles of the Sky

The Rise of Astronomy

Light and Atoms

Telescopes

Earth

The Moon

Survey of Solar Systems

The Terrestrial Planets

The Outer Planets

Small Bodies Orbiting the Sun

The Sun, Our Star

Measuring the Properties of Stars

Stellar Evolution

Stellar Remnants: White Dwarfs, Neutron Stars, and Black Holes

The Milky Way Galaxy

Galaxies

Cosmology

Filters