Question 1

What holds a circularly-moving satellite in orbit while the force of gravity pulls downward on it?

Accepted Answer

Nothing holds the satellite in orbit.It

Question 2

A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton 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) disregard altitude because 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) disregard altitude because it makes no difference.

Question 3

Compared to other fundamental forces,the Universal Gravitational Constant G indicates gravity to be a relatively

Accepted Answer

A) weak force. 
B) strong force. 
C) extremely strong force. 
A) weak force. 
B) strong force. 
C) extremely strong force.

Question 4

What holds Earth satellites up so they don't crash into Earth?

Accepted Answer

A) gravity 
B) centripetal force 
C) centrifugal force 
D) the absence of air resistance 
E) nothing,they continually fall fast enough around Earth not to crash 
A) gravity 
B) centripetal force 
C) centrifugal force 
D) the absence of air resistance 
E) nothing,they continually fall fast enough around Earth not to crash

Question 5

Escape speed for a rocket is greatest from

Accepted Answer

A) Earth. 
B) the Moon. 
C) the Sun. 
D) same for each 
A) Earth. 
B) the Moon. 
C) the Sun. 
D) same for each

Question 6

The Moon continually falls toward Earth,but doesn't get closer because

Accepted Answer

A) the distance of fall is very small. 
B) its tangential velocity causes it to fall around as well as toward Earth. 
C) gravitation is extremely weak at the Earth-Moon distance. 
A) the distance of fall is very small. 
B) its tangential velocity causes it to fall around as well as toward Earth. 
C) gravitation is extremely weak at the Earth-Moon distance.

Question 7

The speeds of the planets about the Sun depend on

Accepted Answer

A) their distances from the Sun. 
B) the masses of the planets. 
C) both of these 
D) none of the above 
A) their distances from the Sun. 
B) the masses of the planets. 
C) both of these 
D) none of the above

Question 8

Dwarf planet Pluto was discovered by perturbations of

Accepted Answer

A) Jupiter. 
B) Saturn. 
C) Uranus and Neptune. 
D) all of the above 
A) Jupiter. 
B) Saturn. 
C) Uranus and Neptune. 
D) all of the above

Question 9

An Earth satellite in an elliptical orbit travels fastest when it is

Accepted Answer

A) nearest the Earth. 
B) farthest from the Earth. 
C) neither of these 
A) nearest the Earth. 
B) farthest from the Earth. 
C) neither of these

Question 10

Neglecting air resistance,after a ball leaves your hand when you toss it upward,the force on it

Accepted Answer

A) gradually decreases until the ball reaches the top of its path. 
B) first acts upward and then downward after reaching the top. 
C) is only the force due to gravity,always directed downward. 
D) none of the above 
A) gradually decreases until the ball reaches the top of its path. 
B) first acts upward and then downward after reaching the top. 
C) is only the force due to gravity,always directed downward. 
D) none of the above

Question 11

If the masses of two planets doubles and the distance between them also doubles,the force between them would be

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 12

If Earth's mass somehow doubles with no change in its size,and your mass remains the same,your weight

Accepted Answer

A) also doubles. 
B) is quadrupled. 
C) remains the same. 
A) also doubles. 
B) is quadrupled. 
C) remains the same.

Question 13

The circular path of a satellite orbiting Earth is characterized by a constant

Accepted Answer

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

Question 14

According to Newton,the closer gravitationally interacting objects are to each other,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 15

Escape speed for a rocket is less from

Accepted Answer

A) Earth. 
B) the Moon. 
C) the Sun. 
D) same for each 
A) Earth. 
B) the Moon. 
C) the Sun. 
D) same for each

Question 16

Shoot a cannonball horizontally from a cannon at a mountain top and it gains speed as it falls and hits the ground below.But fire the cannonball fast enough for circular orbit and no change in speed occurs.Why?

Accepted Answer

The slower cannonball has a parabolic tr

Question 17

The fastest moving planet in a solar system is the

Accepted Answer

A) smallest planet. 
B) most massive planet. 
C) planet nearest the Sun. 
D) planet farthest from the Sun. 
E) none of the above 
A) smallest planet. 
B) most massive planet. 
C) planet nearest the Sun. 
D) planet farthest from the Sun. 
E) none of the above

Question 18

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 19

Two projectiles are fired at equal speeds but different angles.One is fired at an angle of 30° and the other at 60°.With no air resistance,the projectile to hit the ground first will be the one fired at

Accepted Answer

A) 30°. 
B) 60°. 
C) both hit at the same time 
A) 30°. 
B) 60°. 
C) both hit at the same time

Question 20

An outcome of universal gravitation is that

Accepted Answer

A) planets aren't cubes with sharp corners. 
B) its discovery prompted other laws of nature. 
C) it provided prediction and discovery of planets. 
D) all of the above 
A) planets aren't cubes with sharp corners. 
B) its discovery prompted other laws of nature. 
C) it provided prediction and discovery of planets. 
D) all of the above

Exam 4: Gravity, Projectiles, and Satellites

What holds a circularly-moving satellite in orbit while the force of gravity pulls downward on it?

A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton at another altitude.The supplier should

Compared to other fundamental forces,the Universal Gravitational Constant G indicates gravity to be a relatively

What holds Earth satellites up so they don't crash into Earth?

Escape speed for a rocket is greatest from

The Moon continually falls toward Earth,but doesn't get closer because

The speeds of the planets about the Sun depend on

Dwarf planet Pluto was discovered by perturbations of

An Earth satellite in an elliptical orbit travels fastest when it is

Neglecting air resistance,after a ball leaves your hand when you toss it upward,the force on it

If the masses of two planets doubles and the distance between them also doubles,the force between them would be

If Earth's mass somehow doubles with no change in its size,and your mass remains the same,your weight

The circular path of a satellite orbiting Earth is characterized by a constant

According to Newton,the closer gravitationally interacting objects are to each other,the

Escape speed for a rocket is less from

Shoot a cannonball horizontally from a cannon at a mountain top and it gains speed as it falls and hits the ground below.But fire the cannonball fast enough for circular orbit and no change in speed occurs.Why?

The fastest moving planet in a solar system is the

You can experience weight

Two projectiles are fired at equal speeds but different angles.One is fired at an angle of 30° and the other at 60°.With no air resistance,the projectile to hit the ground first will be the one fired at

An outcome of universal gravitation is that

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 Time - Reading 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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