Question 1

When a star collapses to form a black hole, its mass

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same. 
A) increases. 
B) decreases. 
C) remains the same.

Question 2

The force of Earth's gravity on a capsule in space increases as it comes closer. When the capsule moves to half its distance, the force toward Earth is then

Accepted Answer

A) twice. 
B) three times greater. 
C) four times greater. 
D) none of the above 
A) twice. 
B) three times greater. 
C) four times greater. 
D) none of the above

Question 3

The force of Earth's gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes

Accepted Answer

A) half. 
B) three-quarters. 
C) one-fourth. 
D) none of the above 
A) half. 
B) three-quarters. 
C) one-fourth. 
D) none of the above

Question 4

A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above Earth's surface. How much is her weight there?

Accepted Answer

A) 0 
B) 100 N 
C) 200 N 
D) 400 N 
E) none of the above 
A) 0 
B) 100 N 
C) 200 N 
D) 400 N 
E) none of the above

Question 5

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed

Accepted Answer

A) toward the asteroid. 
B) away from the asteroid. 
C) toward the Sun. 
A) toward the asteroid. 
B) away from the asteroid. 
C) toward the Sun.

Question 6

If Earth's radius somehow increased with no change in mass, your weight would

Accepted Answer

A) increase also. 
B) decrease. 
C) stay the same. 
A) increase also. 
B) decrease. 
C) stay the same.

Question 7

The identities of dark energy and dark matter are

Accepted Answer

A) unknown at this time. 
B) subjects of intense astronomical interest. 
C) both of these 
D) neither of these 
A) unknown at this time. 
B) subjects of intense astronomical interest. 
C) both of these 
D) neither of these

Question 8

Surrounding a magnet is a magnetic field. Surrounding an electron is an electric field. Surrounding Earth is

Accepted Answer

A) an alteration in space in which mass experiences a force. 
B) a gravitational field. 
C) both of these 
D) neither of these 
A) an alteration in space in which mass experiences a force. 
B) a gravitational field. 
C) both of these 
D) neither of these

Question 9

Which of these three produces the greatest tidal effect on you right now?

Accepted Answer

A) the Moon 
B) the Sun 
C) the Earth 
A) the Moon 
B) the Sun 
C) the Earth

Question 10

If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would

Accepted Answer

A) be the same. 
B) double. 
C) quadruple. 
D) be eight times as much as now. 
E) none of the above 
A) be the same. 
B) double. 
C) quadruple. 
D) be eight times as much as now. 
E) none of the above

Question 11

The concept of force is fundamental to

Accepted Answer

A) Newton's theory of gravitation. 
B) Einstein's theory of gravitation. 
C) both of these 
D) neither of these 
A) Newton's theory of gravitation. 
B) Einstein's theory of gravitation. 
C) both of these 
D) neither of these

Question 12

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be

Accepted Answer

A) zero. 
B) 40 N. 
C) 120 N. 
D) 360 N. 
E) 1080 N. 
A) zero. 
B) 40 N. 
C) 120 N. 
D) 360 N. 
E) 1080 N.

Question 13

You experience weightlessness

Accepted Answer

A) in the absence of a supporting surface. 
B) momentarily when you step off a chair. 
C) in a freely falling elevator. 
D) all of the above 
A) in the absence of a supporting surface. 
B) momentarily when you step off a chair. 
C) in a freely falling elevator. 
D) all of the above

Question 14

Inside a freely-falling runaway elevator, your

Accepted Answer

A) acceleration is zero. 
B) weight is zero. 
C) gravitational interaction with Earth is zero. 
D) all of the above 
E) none of the above 
A) acceleration is zero. 
B) weight is zero. 
C) gravitational interaction with Earth is zero. 
D) all of the above 
E) none of the above

Question 15

The force of gravity acting on you will increase if you

Accepted Answer

A) burrow deep inside Earth. 
B) stand on a planet with a shrinking radius. 
C) both of these 
D) neither of these 
A) burrow deep inside Earth. 
B) stand on a planet with a shrinking radius. 
C) both of these 
D) neither of these

Question 16

Tidal forces in general are the result of

Accepted Answer

A) two or more sources of gravitation. 
B) a combination of any kind of forces acting on a body. 
C) unequal forces acting on different parts of a body. 
D) the inverse-square law. 
E) unequal fluid flow. 
A) two or more sources of gravitation. 
B) a combination of any kind of forces acting on a body. 
C) unequal forces acting on different parts of a body. 
D) the inverse-square law. 
E) unequal fluid flow.

Question 17

The direction of a gravitational field is

Accepted Answer

A) in the same direction as gravitational attraction. 
B) away from the center of gravity of an object. 
C) opposite to the direction of gravitational attraction. 
A) in the same direction as gravitational attraction. 
B) away from the center of gravity of an object. 
C) opposite to the direction of gravitational attraction.

Question 18

To make a profit a buyer purchases metal by weight at one altitude and sells it at the same price per pound at another altitude. The supplier should

Accepted Answer

A) buy at a high altitude and sell at a low altitude. 
B) buy at a low altitude and sell at a high altitude. 
C) it makes no difference. 
A) buy at a high altitude and sell at a low altitude. 
B) buy at a low altitude and sell at a high altitude. 
C) it makes no difference.

Question 19

During an eclipse of the Sun the high ocean tides on Earth are

Accepted Answer

A) extra high. 
B) extra low. 
C) not significantly different. 
A) extra high. 
B) extra low. 
C) not significantly different.

Question 20

The main reason ocean tides exist is that Moon's pull is stronger

Accepted Answer

A) than the pull of the Sun. 
B) on water closer to it than on water farther away. 
C) on Earth's oceans than on Earth itself. 
D) all of the above 
A) than the pull of the Sun. 
B) on water closer to it than on water farther away. 
C) on Earth's oceans than on Earth itself. 
D) all of the above

Exam 9: Gravity

When a star collapses to form a black hole, its mass

The force of Earth's gravity on a capsule in space increases as it comes closer. When the capsule moves to half its distance, the force toward Earth is then

The force of Earth's gravity on a capsule in space will lessen as it moves farther away. If the capsule moves to twice its distance, the force toward Earth becomes

A weight watcher who normally weighs 400 N stands on top of a very tall ladder so she is one Earth radius above Earth's surface. How much is her weight there?

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force on the spacecraft is directed

If Earth's radius somehow increased with no change in mass, your weight would

The identities of dark energy and dark matter are

Surrounding a magnet is a magnetic field. Surrounding an electron is an electric field. Surrounding Earth is

Which of these three produces the greatest tidal effect on you right now?

If your mass, the mass of Earth, and the mass of everything in the solar system were twice as much as it is now, yet everything stayed the same size, your weight on Earth would

The concept of force is fundamental to

An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft moves to a position three times as far from the center of the asteroid, the force will be

You experience weightlessness

Inside a freely-falling runaway elevator, your

The force of gravity acting on you will increase if you

Tidal forces in general are the result of

The direction of a gravitational field is

To make a profit a buyer purchases metal by weight at one altitude and sells it at the same price per pound at another altitude. The supplier should

During an eclipse of the Sun the high ocean tides on Earth are

The main reason ocean tides exist is that Moon's pull is stronger

About Science

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