Question 1

In the vacuum of outer space, there is no

Accepted Answer

A) gravity. 
B) atmospheric pressure. 
C) both 
A) gravity. 
B) atmospheric pressure. 
C) both

Question 2

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

Accepted Answer

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

Question 3

An object is thrown vertically into the air. Because of air resistance, the time for its descent will be

Accepted Answer

A) longer than the ascent time. 
B) shorter than the ascent time. 
C) equal to the ascent time. 
D) not enough information 
A) longer than the ascent time. 
B) shorter than the ascent time. 
C) equal to the ascent time. 
D) not enough information

Question 4

If the Sun were twice as massive,

Accepted Answer

A) its pull on the Earth would double. 
B) Earth's pull on the Sun would double. 
C) both 
D) neither 
A) its pull on the Earth would double. 
B) Earth's pull on the Sun would double. 
C) both 
D) neither

Question 5

Strictly speaking, when you step off a curb you are momentarily

Accepted Answer

A) in orbit. 
B) weightless. 
C) in space. 
A) in orbit. 
B) weightless. 
C) in space.

Question 6

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 7

When the distance between two stars doubles, 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) remains 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) remains the same.

Question 8

The International Space Station orbits at an average 360-km altitude so that it is mainly above Earth's

Accepted Answer

A) atmosphere. 
B) gravitation. 
C) both 
A) atmosphere. 
B) gravitation. 
C) both

Question 9

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) s 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) s only the force due to gravity, always directed downward. 
D) none of the above

Question 10

Ignoring air drag, what is the maximum speed that can be given to a horizontally moving tennis ball as it clears the net 1.25 m high to remain within the edge of the court, which is 12.0 m distant?

Accepted Answer

A) 12.0 m/s 
B) 16.0 m/s 
C) 24.0 m/s 
D) 48.0 m/s 
A) 12.0 m/s 
B) 16.0 m/s 
C) 24.0 m/s 
D) 48.0 m/s

Question 11

An Earth satellite is simply a projectile freely falling around the Earth.

Accepted Answer

A) true 
B) false 
C) sometimes true and sometimes false 
A) true 
B) false 
C) sometimes true and sometimes false

Question 12

A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per kilogram 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 13

A projectile is launched at an angle of 15° above the horizontal and lands downrange. With no air resistance, what other projection angle for the same speed would produce the same downrange distance?

Accepted Answer

A) 30° 
B) 45° 
C) 50° 
D) 75° 
E) 90° 
A) 30° 
B) 45° 
C) 50° 
D) 75° 
E) 90°

Question 14

A hunter aims a rifle at an angle of 10° above the horizontal. The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle. Which bullet hits the ground first?

Accepted Answer

A) the dropped one 
B) the fired one 
C) both hit at the same time 
A) the dropped one 
B) the fired one 
C) both hit at the same time

Question 15

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about the Moon would be

Accepted Answer

A) less than 8 km/s. 
B) more than 8 km/s. 
C) about 8 km/s. 
A) less than 8 km/s. 
B) more than 8 km/s. 
C) about 8 km/s.

Question 16

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 17

The Sun is spherical due to

Accepted Answer

A) Earth circling it. 
B) Earth and Moon circling it. 
C) gravitation. 
D) none of the above 
A) Earth circling it. 
B) Earth and Moon circling it. 
C) gravitation. 
D) none of the above

Question 18

How is stepping off a curb similar to taking a ride aboard the space shuttle?

Accepted Answer

In both instances you experience weightl

Question 19

The fastest moving planet in a solar system is

Accepted Answer

A) the smallest planet. 
B) the most massive planet. 
C) the planet nearest the Sun. 
D) the planet farthest from the Sun. 
E) any planet, for they all move at the same speed. 
A) the smallest planet. 
B) the most massive planet. 
C) the planet nearest the Sun. 
D) the planet farthest from the Sun. 
E) any planet, for they all move at the same speed.

Question 20

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground. Such twice-as-high apples of the same mass, have

Accepted Answer

A) 1/4 the weight. 
B) 1/2 the weight. 
C) practically the same weight. 
A) 1/4 the weight. 
B) 1/2 the weight. 
C) practically the same weight.

Exam 4: Gravity, Projectiles, and Satellites

In the vacuum of outer space, there is no

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

An object is thrown vertically into the air. Because of air resistance, the time for its descent will be

If the Sun were twice as massive,

Strictly speaking, when you step off a curb you are momentarily

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

When the distance between two stars doubles, the force between them

The International Space Station orbits at an average 360-km altitude so that it is mainly above Earth's

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

Ignoring air drag, what is the maximum speed that can be given to a horizontally moving tennis ball as it clears the net 1.25 m high to remain within the edge of the court, which is 12.0 m distant?

An Earth satellite is simply a projectile freely falling around the Earth.

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

A projectile is launched at an angle of 15° above the horizontal and lands downrange. With no air resistance, what other projection angle for the same speed would produce the same downrange distance?

A hunter aims a rifle at an angle of 10° above the horizontal. The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle. Which bullet hits the ground first?

Minimal orbit speed about Earth is about 8 km/s. Minimal orbital speed about the Moon would be

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

The Sun is spherical due to

How is stepping off a curb similar to taking a ride aboard the space shuttle?

The fastest moving planet in a solar system is

The force of gravity acts on all apples on an apple tree. Some apples are twice as far from the ground. Such twice-as-high apples of the same mass, have

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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