Question 1

A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 s later?

Accepted Answer

A) 50 m 
B) 98 m 
C) 100 m 
D) 500 m 
E) none of the above 
A) 50 m 
B) 98 m 
C) 100 m 
D) 500 m 
E) none of the above

Question 2

The planet Neptune was discovered by perturbations of

Accepted Answer

A) Uranus. 
B) its moons. 
C) Pluto. 
D) none of the above 
A) Uranus. 
B) its moons. 
C) Pluto. 
D) none of the above

Question 3

Planets would crash into the Sun if it weren't for

Accepted Answer

A) their tangential velocities. 
B) their vast distances from the Sun. 
C) the inverse-square law. 
D) their relatively small masses. 
E) the fact that they are beyond the main gravitation of the Sun. 
A) their tangential velocities. 
B) their vast distances from the Sun. 
C) the inverse-square law. 
D) their relatively small masses. 
E) the fact that they are beyond the main gravitation of the Sun.

Question 4

When the distance between two stars decreases by half, the force between them

Accepted Answer

A) decreases by one-quarter. 
B) decreases by one-half. 
C) increases to twice as much. 
D) increases to four times as much. 
E) stays the same. 
A) decreases by one-quarter. 
B) decreases by one-half. 
C) increases to twice as much. 
D) increases to four times as much. 
E) stays the same.

Question 5

If your mass remained the same while the mass of Earth doubled while staying the same size, your weight 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 6

According to Newton, the greater the distance between gravitationally interacting objects, the

Accepted Answer

A) less the gravitational force between them. 
B) more the gravitational force between them. 
C) constancy of the force between them. 
A) less the gravitational force between them. 
B) more the gravitational force between them. 
C) constancy of the force between them.

Question 7

Why do satellites remain in orbit while the force of gravity pulls downward on them?

Accepted Answer

They remain in orbit because the force o

Question 8

If the masses of two planets doubles and the distance between reduces by half, the force between them would be

Accepted Answer

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

Question 9

Chapter 4 in your textbook cites a link between Newton's Universal Law of Gravity and

Accepted Answer

A) biological processes. 
B) chemical processes. 
C) geological processes. 
D) the U.S. Constitution. 
E) none of the above 
A) biological processes. 
B) chemical processes. 
C) geological processes. 
D) the U.S. Constitution. 
E) none of the above

Question 10

A satellite in an elliptical orbit travels at constant

Accepted Answer

A) velocity. 
B) speed. 
C) acceleration. 
D) all the above 
E) none of the above 
A) velocity. 
B) speed. 
C) acceleration. 
D) all the above 
E) none of the above

Question 11

Perturbations of planets are due to

Accepted Answer

A) interplanetary forces. 
B) deviations from straight-line paths. 
C) uneven masses of planets. 
D) none of the above 
A) interplanetary forces. 
B) deviations from straight-line paths. 
C) uneven masses of planets. 
D) none of the above

Question 12

At some point between Earth and the Moon, the forces due to gravity on a space traveler would be the same. This point is

Accepted Answer

A) nearer Earth. 
B) nearer the Moon. 
C) mid-way between Earth and the Moon. 
D) none of the above 
A) nearer Earth. 
B) nearer the Moon. 
C) mid-way between Earth and the Moon. 
D) none of the above

Question 13

For the astronauts inside an orbiting space vehicle, there is no force of Earth's gravity acting on them. This statement is

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 14

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 force is shielded inside the building. 
B) mass of the building attracts us upward slightly. 
C) both 
D) none of the above 
A) gravitational force is shielded inside the building. 
B) mass of the building attracts us upward slightly. 
C) both 
D) none of the above

Question 15

If a projectile is fired straight up at a speed of 10 m/s, neglecting air resistance, the total time to return to its starting position is

Accepted Answer

A) 1 s. 
B) 2 s. 
C) 10 s. 
D) 20 s. 
E) not enough information 
A) 1 s. 
B) 2 s. 
C) 10 s. 
D) 20 s. 
E) not enough information

Question 16

Consider two planets in space that gravitationally attract each other. If the mass of one planet is doubled, and the distance between them doesn't change, then 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 17

Inside a freely falling elevator your

Accepted Answer

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

Question 18

Why does a satellite in elliptical orbit gain speed as it moves closer to the planet? When is its kinetic energy the greatest? The least? Where is its potential energy greatest? The least?

Accepted Answer

The sum of a satellite's potential and k

Question 19

Escape speed from Earth is

Accepted Answer

A) 8 km/s. 
B) 9.8 km/s. 
C) 11.2 km/s. 
D) 42.2 km/s. 
A) 8 km/s. 
B) 9.8 km/s. 
C) 11.2 km/s. 
D) 42.2 km/s.

Question 20

Throw an object at an angle upward. With no gravity it will follow a straight-line path. But because of gravity, at the end of 1 s, it is

Accepted Answer

A) 5 m below the straight line. 
B) 10 m below the straight line. 
C) 15 m below the straight line. 
A) 5 m below the straight line. 
B) 10 m below the straight line. 
C) 15 m below the straight line.

Exam 4: Gravity, Projectiles, and Satellites

A gun with a muzzle velocity of 100 m/s is fired horizontally from a tower. Neglecting air resistance, how far downrange will the bullet be 1 s later?

The planet Neptune was discovered by perturbations of

Planets would crash into the Sun if it weren't for

When the distance between two stars decreases by half, the force between them

If your mass remained the same while the mass of Earth doubled while staying the same size, your weight would

According to Newton, the greater the distance between gravitationally interacting objects, the

Why do satellites remain in orbit while the force of gravity pulls downward on them?

If the masses of two planets doubles and the distance between reduces by half, the force between them would be

Chapter 4 in your textbook cites a link between Newton's Universal Law of Gravity and

A satellite in an elliptical orbit travels at constant

Perturbations of planets are due to

At some point between Earth and the Moon, the forces due to gravity on a space traveler would be the same. This point is

For the astronauts inside an orbiting space vehicle, there is no force of Earth's gravity acting on them. This statement is

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

If a projectile is fired straight up at a speed of 10 m/s, neglecting air resistance, the total time to return to its starting position is

Consider two planets in space that gravitationally attract each other. If the mass of one planet is doubled, and the distance between them doesn't change, then the force between them is

Inside a freely falling elevator your

Why does a satellite in elliptical orbit gain speed as it moves closer to the planet? When is its kinetic energy the greatest? The least? Where is its potential energy greatest? The least?

Escape speed from Earth is

Throw an object at an angle upward. With no gravity it will follow a straight-line path. But because of gravity, at the end of 1 s, it is

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

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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