Question 1

One side of the Moon continually facing Earth is

Accepted Answer

A) a passing phenomenon. 
B) a cosmic coincidence. 
C) tidal lock. 
A) a passing phenomenon. 
B) a cosmic coincidence. 
C) tidal lock.

Question 2

The Earth is closer to the Sun in January than in July, which accounts for the fact that the highest high tides in the Northern Hemisphere occur in

Accepted Answer

A) winter. 
B) spring. 
C) summer. 
D) none of the above 
A) winter. 
B) spring. 
C) summer. 
D) none of the above

Question 3

You can experience weight

Accepted Answer

A) standing on Earth's surface. 
B) in an accelerating elevator away from Earth. 
C) in a rotating habitat in space. 
D) all of the above 
A) standing on Earth's surface. 
B) in an accelerating elevator away from Earth. 
C) in a rotating habitat in space. 
D) all of the above

Question 4

If you jounce up and down on a bathroom scale, what varies on the scale reading is

Accepted Answer

A) mg. 
B) the normal force. 
C) both of these 
D) neither of these 
A) mg. 
B) the normal force. 
C) both of these 
D) neither of these

Question 5

The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much because

Accepted Answer

A) your mass is 100 times less on Jupiter. 
B) Jupiter is significantly farther from the Sun. 
C) Jupiter's radius is about 10 times Earth's radius. 
D) you are 100 times more weightless there. 
E) none of the above 
A) your mass is 100 times less on Jupiter. 
B) Jupiter is significantly farther from the Sun. 
C) Jupiter's radius is about 10 times Earth's radius. 
D) you are 100 times more weightless there. 
E) none of the above

Question 6

Earth's gravitational field extends

Accepted Answer

A) only above and beyond Earth's surface and cancels inside Earth. 
B) both inside and outside Earth and throughout the entire universe. 
C) neither of these 
A) only above and beyond Earth's surface and cancels inside Earth. 
B) both inside and outside Earth and throughout the entire universe. 
C) neither of these

Question 7

As two objects moving toward each other due to gravity get closer, the acceleration of each

Accepted Answer

A) decreases. 
B) remains constant. 
C) increases. 
A) decreases. 
B) remains constant. 
C) increases.

Question 8

Rate this statement: No force due to Earth's gravity acts on astronauts inside the orbiting space station.

Accepted Answer

A) always true while in orbit 
B) sometimes true while in orbit 
C) always false 
A) always true while in orbit 
B) sometimes true while in orbit 
C) always false

Question 9

The origin of any microtides in the human body is most likely the

Accepted Answer

A) Sun. 
B) Moon. 
C) Earth. 
A) Sun. 
B) Moon. 
C) Earth.

Question 10

Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in an orbiting space vehicle do not, because passengers in the space vehicle are

Accepted Answer

A) beyond the main pull of Earth's gravity. 
B) above Earth's atmosphere. 
C) without support forces. 
D) all of the above 
E) none of the above 
A) beyond the main pull of Earth's gravity. 
B) above Earth's atmosphere. 
C) without support forces. 
D) all of the above 
E) none of the above

Question 11

When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be

Accepted Answer

A) less. 
B) no different. 
C) more. 
A) less. 
B) no different. 
C) more.

Question 12

If the Sun collapsed to a black hole, Earth's gravitational attraction to it would be

Accepted Answer

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

Question 13

Two planets in space gravitationally attract each other. If both the masses and distances are doubled, the force between them is

Accepted Answer

A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 14

If the Moon were four times as massive but twice as far from Earth, high tides on Earth would be

Accepted Answer

A) higher. 
B) lower. 
C) no different. 
A) higher. 
B) lower. 
C) no different.

Question 15

A black hole is

Accepted Answer

A) an empty region of space with a huge gravitational field. 
B) at the center if all stars. 
C) the remains of a giant star that has undergone gravitational collapse. 
A) an empty region of space with a huge gravitational field. 
B) at the center if all stars. 
C) the remains of a giant star that has undergone gravitational collapse.

Question 16

Newton discovered

Accepted Answer

A) gravity. 
B) that gravity is universal. 
C) neither of these 
A) gravity. 
B) that gravity is universal. 
C) neither of these

Question 17

Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

Accepted Answer

A) gravitational field is shielded inside the building. 
B) mass of the building above slightly attracts us upward. 
C) both of these 
D) neither of these 
A) gravitational field is shielded inside the building. 
B) mass of the building above slightly attracts us upward. 
C) both of these 
D) neither of these

Question 18

Tides caused mainly by the Moon occur in Earth's

Accepted Answer

A) oceans. 
B) atmosphere. 
C) interior. 
D) all of the above 
A) oceans. 
B) atmosphere. 
C) interior. 
D) all of the above

Question 19

We do not observe tides in a community swimming pool because

Accepted Answer

A) gravitation on the small mass of water is negligibly small. 
B) it is shallow compared to the ocean. 
C) all parts of it are practically the same distance from the Moon. 
D) they are masked by the much stronger pull of Earth gravity. 
E) the tides are only observed at night. 
A) gravitation on the small mass of water is negligibly small. 
B) it is shallow compared to the ocean. 
C) all parts of it are practically the same distance from the Moon. 
D) they are masked by the much stronger pull of Earth gravity. 
E) the tides are only observed at night.

Question 20

If Earth's mass decreased to one-half its original mass with no change in radius, then your weight would

Accepted Answer

A) decrease to one-quarter. 
B) decrease to half. 
C) stay the same. 
D) none of the above 
A) decrease to one-quarter. 
B) decrease to half. 
C) stay the same. 
D) none of the above

Exam 9: Gravity

One side of the Moon continually facing Earth is

The Earth is closer to the Sun in January than in July, which accounts for the fact that the highest high tides in the Northern Hemisphere occur in

You can experience weight

If you jounce up and down on a bathroom scale, what varies on the scale reading is

The planet Jupiter is about 300 times as massive as Earth, yet on its surface you would weigh only about 3 times as much because

Earth's gravitational field extends

As two objects moving toward each other due to gravity get closer, the acceleration of each

Rate this statement: No force due to Earth's gravity acts on astronauts inside the orbiting space station.

The origin of any microtides in the human body is most likely the

Passengers in a high-flying jumbo jet feel their normal weight in flight, while passengers in an orbiting space vehicle do not, because passengers in the space vehicle are

When you weigh yourself on a bathroom scale on a slight incline instead of a level surface, your weight reading on the scale will be

If the Sun collapsed to a black hole, Earth's gravitational attraction to it would be

Two planets in space gravitationally attract each other. If both the masses and distances are doubled, the force between them is

If the Moon were four times as massive but twice as far from Earth, high tides on Earth would be

A black hole is

Newton discovered

Each of us weighs a tiny bit less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

Tides caused mainly by the Moon occur in Earth's

We do not observe tides in a community swimming pool because

If Earth's mass decreased to one-half its original mass with no change in radius, then your weight would

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