Question 1

The equivalence principle can be best illustrated by ____.

Accepted Answer

A)  a person riding in an elevator 
B)  a rocket coasting through space at a constant velocity 
C)  the change in mass of a moving body 
D)  the formation of energy by nuclear fusion 
E)  a car ride on a highway with the windows open 
A)  a person riding in an elevator 
B)  a rocket coasting through space at a constant velocity 
C)  the change in mass of a moving body 
D)  the formation of energy by nuclear fusion 
E)  a car ride on a highway with the windows open A

Question 2

Why does the circular velocity of an Earth satellite depend on the distance from Earth's center?

Accepted Answer

The equation for circular velocity is as follows: 
          
The constant G is the gravitational constant that connects units of mass to units of gravitational force, M is the mass of the central body and r is the radius of the orbit in meters. Thus, the distance between the satellite and Earth's center impacts circular velocity.

Question 3

Match between columns
                        Premises: States that observers cannot detect their uniform motion through space through internal tests
The velocity required to break free of an astronomical body
States that a gravitational field is a curvature of space-time caused by the presence of mass
A measure of an object's mass along with its speed of rotation
The amount of matter in a body
States that the force of gravity is inversely proportional to the square of the distance between two masses
Occurs without force
A measure of an object's amount of motion
The resistance of matter to changes in motion
Follows an elliptical path

Accepted Answer

The Answer of Special theory of relativity and General theory is...

Question 4

How does gravity explain the presence of the tides we experience on Earth?

Accepted Answer

Tides are caused by small differences in

Question 5

The second postulate of special relativity states that the speed of light, when measured in a vacuum, is constant for all observers.

Accepted Answer

A) True 
 B)False

Question 6

Two objects in orbit around each other orbit their common center of mass.

Accepted Answer

A) True 
 B)False

Question 7

Spring tides occur during the new and full lunar phases.

Accepted Answer

A) True 
 B)False

Question 8

Newton's law of gravitational force states that ____.

Accepted Answer

A)  an object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity 
B)  an object with no force on it moves in a straight line with constant acceleration 
C)  for every action, there is an equal and opposite reaction 
D)  the force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared 
E)  an object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force 
A)  an object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity 
B)  an object with no force on it moves in a straight line with constant acceleration 
C)  for every action, there is an equal and opposite reaction 
D)  the force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared 
E)  an object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force

Question 9

_______________ occur when tides caused by the Sun and Moon partially cancel out.

Accepted Answer

The answer of _______________ occur when tides caused by the...

Question 10

The apogee of a(n) ____ orbit does not exist.

Accepted Answer

A)  closed 
B)  elliptical 
C)  geosynchronous 
D)  hyperbolic 
E)  parabolic 
A)  closed 
B)  elliptical 
C)  geosynchronous 
D)  hyperbolic 
E)  parabolic

Question 11

Gravity obeys the inverse square law, which implies that the gravitational force of one body on another will be ____ times stronger at two meters than at six meters apart.

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  9 
E)  10 
A)  2 
B)  3 
C)  4 
D)  9 
E)  10

Question 12

Which statement expresses Newton's first law of motion?

Accepted Answer

A)  An object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity. 
B)  An object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force. 
C)  For every action, there is an equal and opposite reaction. 
D)  The force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared. 
E)  The force between two objects is inversely proportional to the product of their masses and directly proportional to the distance between them squared. 
A)  An object with no force on acting on it continues at rest or moves in uniform motion in a straight line with constant velocity. 
B)  An object with a force on it is accelerated in the direction of the force an amount inversely proportional to its mass and directly proportional to the size of the force. 
C)  For every action, there is an equal and opposite reaction. 
D)  The force between two objects is directly proportional to the product of their masses and inversely proportional to the distance between them squared. 
E)  The force between two objects is inversely proportional to the product of their masses and directly proportional to the distance between them squared.

Question 13

A satellite orbiting a planet at a distance  d  above its surface moves ________ an object orbiting a distance 2 d  above the surface.

Accepted Answer

A)  more rapidly than 
B)  at the same rate as 
C)  slower than 
A)  more rapidly than 
B)  at the same rate as 
C)  slower than

Question 14

A ball is dropped from the top of a science building. After falling for three seconds, the speed of the ball would be _______________ m/s.

Accepted Answer

The answer of A ball is dropped from the top...

Question 15

Special relativity states the relationship between energy and mass as   .

Accepted Answer

A) True 
 B)False

Question 16

According to __________, _______________ motion occurs when natural motion has to be sustained by a force.

Accepted Answer

The answer of According to __________, _______________ motion occurs when...

Question 17

Newtonian physics tells us that Kepler's second law is a result of the conservation of ____.

Accepted Answer

A)  angular momentum 
B)  linear acceleration 
C)  energy 
D)  mass 
E)  velocity 
A)  angular momentum 
B)  linear acceleration 
C)  energy 
D)  mass 
E)  velocity

Question 18

Changing the direction of a moving body does not impact its velocity.

Accepted Answer

A) True 
 B)False

Question 19

Explain why the term acceleration is important to the first postulate of special relativity.

Accepted Answer

The first postulate states that the laws

Question 20

In contradiction to the teachings of Aristotle, Galileo found that an object with no forces (and no friction) acting on it will ____.

Accepted Answer

A)  move faster and faster 
B)  eventually stop moving 
C)  move at a constant speed forever 
D)  first increase and then decrease in speed 
E)  first decrease and then increase in speed 
A)  move faster and faster 
B)  eventually stop moving 
C)  move at a constant speed forever 
D)  first increase and then decrease in speed 
E)  first decrease and then increase in speed

The equivalence principle can be best illustrated by ____.

Why does the circular velocity of an Earth satellite depend on the distance from Earth's center?

How does gravity explain the presence of the tides we experience on Earth?

The second postulate of special relativity states that the speed of light, when measured in a vacuum, is constant for all observers.

Two objects in orbit around each other orbit their common center of mass.

Spring tides occur during the new and full lunar phases.

Newton's law of gravitational force states that ____.

_______________ occur when tides caused by the Sun and Moon partially cancel out.

The apogee of a(n) ____ orbit does not exist.

Gravity obeys the inverse square law, which implies that the gravitational force of one body on another will be ____ times stronger at two meters than at six meters apart.

Which statement expresses Newton's first law of motion?

A satellite orbiting a planet at a distance d above its surface moves ________ an object orbiting a distance 2 d above the surface.

A ball is dropped from the top of a science building. After falling for three seconds, the speed of the ball would be _______________ m/s.

Special relativity states the relationship between energy and mass as .

According to , _____ motion occurs when natural motion has to be sustained by a force.

Newtonian physics tells us that Kepler's second law is a result of the conservation of ____.

Changing the direction of a moving body does not impact its velocity.

Explain why the term acceleration is important to the first postulate of special relativity.

In contradiction to the teachings of Aristotle, Galileo found that an object with no forces (and no friction) acting on it will ____.

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters

Exam 5: Gravity

The equivalence principle can be best illustrated by ____.

Why does the circular velocity of an Earth satellite depend on the distance from Earth's center?

How does gravity explain the presence of the tides we experience on Earth?

The second postulate of special relativity states that the speed of light, when measured in a vacuum, is constant for all observers.

Two objects in orbit around each other orbit their common center of mass.

Spring tides occur during the new and full lunar phases.

Newton's law of gravitational force states that ____.

_______________ occur when tides caused by the Sun and Moon partially cancel out.

The apogee of a(n) ____ orbit does not exist.

Gravity obeys the inverse square law, which implies that the gravitational force of one body on another will be ____ times stronger at two meters than at six meters apart.

Which statement expresses Newton's first law of motion?

A satellite orbiting a planet at a distance d above its surface moves ________ an object orbiting a distance 2 d above the surface.

A ball is dropped from the top of a science building. After falling for three seconds, the speed of the ball would be _______________ m/s.

Special relativity states the relationship between energy and mass as .

According to __________, _______________ motion occurs when natural motion has to be sustained by a force.

Newtonian physics tells us that Kepler's second law is a result of the conservation of ____.

Changing the direction of a moving body does not impact its velocity.

Explain why the term acceleration is important to the first postulate of special relativity.

In contradiction to the teachings of Aristotle, Galileo found that an object with no forces (and no friction) acting on it will ____.

Here and Now

A User S Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury: Comparing Airless Worlds

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology: Life on Other Worlds

Filters

According to , _____ motion occurs when natural motion has to be sustained by a force.