Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

An object's momentum is equal to its ____.

Accepted Answer

A)  acceleration multiplied by its mass 
B)  acceleration divided by its weight 
C)  velocity multiplied by the gravitational constant 
D)  velocity multiplied by its mass 
E)  velocity divided by its weight 
A)  acceleration multiplied by its mass 
B)  acceleration divided by its weight 
C)  velocity multiplied by the gravitational constant 
D)  velocity multiplied by its mass 
E)  velocity divided by its weight

Question 3

The ____ of an object is a measure of the amount of matter it contains. The ____ is a measure of the gravitational force on an object.

Accepted Answer

A)  weight; mass 
B)  mass; weight 
C)  energy; force 
D)  force; energy 
E)  momentum; energy 
A)  weight; mass 
B)  mass; weight 
C)  energy; force 
D)  force; energy 
E)  momentum; energy

Question 4

Einstein revolutionized modern physics by ____.

Accepted Answer

A)  documenting the existence of gravity through experiments on objects in motion 
B)  proving that Galileo and Newton were fundamentally incorrect about gravity 
C)  explaining how specific gravity impacts the geometry of curved space-time 
D)  providing an explanation of gravity based on the geometry of curved space-time 
E)  defining the difference between violent motion and natural motion 
A)  documenting the existence of gravity through experiments on objects in motion 
B)  proving that Galileo and Newton were fundamentally incorrect about gravity 
C)  explaining how specific gravity impacts the geometry of curved space-time 
D)  providing an explanation of gravity based on the geometry of curved space-time 
E)  defining the difference between violent motion and natural motion

Question 5

How did Newton's Principia impact science?

Accepted Answer

After the  Principia was published, phys

Question 6

Spring tides occur during the new and full lunar phases.

Accepted Answer

A) True 
 B)False

Question 7

Spring tides occur at ____.

Accepted Answer

A)  new moon and first quarter moon 
B)  new moon and full moon 
C)  first quarter moon and third quarter moon 
D)  first quarter moon and full moon 
E)  third quarter moon and full moon 
A)  new moon and first quarter moon 
B)  new moon and full moon 
C)  first quarter moon and third quarter moon 
D)  first quarter moon and full moon 
E)  third quarter moon and full moon

Question 8

Newton's first law of motion is essentially a restatement of Galileo's law of inertia.

Accepted Answer

A) True 
 B)False

Question 9

Special relativity predicts that the observed mass of a moving particle depends on its ____.

Accepted Answer

A)  inertia 
B)  curvature 
C)  velocity 
D)  force 
E)  true position 
A)  inertia 
B)  curvature 
C)  velocity 
D)  force 
E)  true position

Question 10

Spring tides occur ____.

Accepted Answer

A)  only during spring months 
B)  when high tides are unusually low and low tides are unusually high 
C)  when high tides and low tides are unusually low 
D)  when high tides are unusually high and low tides are unusually low 
E)  simultaneously with neap tides 
A)  only during spring months 
B)  when high tides are unusually low and low tides are unusually high 
C)  when high tides and low tides are unusually low 
D)  when high tides are unusually high and low tides are unusually low 
E)  simultaneously with neap tides

Question 11

The _______________ states that an observer cannot distinguish locally the difference between inertial forces due to acceleration and uniform gravitational forces due to the presence of a massive object.

Accepted Answer

equivalenc

Question 12

If the orbital velocity of the Moon is 1.0 km/s, what is the orbital velocity of a satellite that is 1/16th as far from Earth as the Moon? Hints: There is a long way and a short way to do this calculation. 
$v _ { c } = \sqrt { \frac { G M } { r } }$ ; G = 6.67  10-11 m3/s2/kg

Accepted Answer

A)  1/16 km/s 
B)  1/8 km/s 
C)  4 km/s 
D)  8 km/s 
E)  16 km/s 
A)  1/16 km/s 
B)  1/8 km/s 
C)  4 km/s 
D)  8 km/s 
E)  16 km/s

Question 13

The velocity required to escape an astronomical body is known as the _______________.

Accepted Answer

The answer of The velocity required to escape an astronomical...

Question 14

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 15

Mutual gravitation is ____.

Accepted Answer

A)  a type of force that acts on an object moving at constant speed 
B)  the acceleration of an object in the absence of a force 
C)  a property of all matter in the universe 
D)  the limit of gravitational force from one object to another 
E)  a type of force that repels surrounding particles 
A)  a type of force that acts on an object moving at constant speed 
B)  the acceleration of an object in the absence of a force 
C)  a property of all matter in the universe 
D)  the limit of gravitational force from one object to another 
E)  a type of force that repels surrounding particles

Question 16

How did Newton clarify prior laws of planetary motion?

Accepted Answer

Newton's understanding of gravity allowe

Question 17

A(n) ____ orbit is one where the orbiting object is always above the same location on Earth's surface.

Accepted Answer

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

Question 18

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

Question 19

According to the inverse square law, the force due to gravity between two masses will ____.

Accepted Answer

A)  increase as the distance between the two masses increases 
B)  decrease as the square of the distance between the two masses increases 
C)  cause the two masses to move away from each other 
D)  cause the two masses to move in a straight line 
E)  cause the two masses to orbit each other 
A)  increase as the distance between the two masses increases 
B)  decrease as the square of the distance between the two masses increases 
C)  cause the two masses to move away from each other 
D)  cause the two masses to move in a straight line 
E)  cause the two masses to orbit each other

Question 20

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

Accepted Answer

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

Exam 5: Gravity

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

An object's momentum is equal to its ____.

The ____ of an object is a measure of the amount of matter it contains. The ____ is a measure of the gravitational force on an object.

Einstein revolutionized modern physics by ____.

How did Newton's Principia impact science?

Spring tides occur during the new and full lunar phases.

Spring tides occur at ____.

Newton's first law of motion is essentially a restatement of Galileo's law of inertia.

Special relativity predicts that the observed mass of a moving particle depends on its ____.

Spring tides occur ____.

The _______________ states that an observer cannot distinguish locally the difference between inertial forces due to acceleration and uniform gravitational forces due to the presence of a massive object.

If the orbital velocity of the Moon is 1.0 km/s, what is the orbital velocity of a satellite that is 1/16th as far from Earth as the Moon? Hints: There is a long way and a short way to do this calculation. vc=GMrv _ { c } = \sqrt { \frac { G M } { r } }vc​=rGM​​ ; G = 6.67 10-11 m3/s2/kg

The velocity required to escape an astronomical body is known as the _______________.

Newton's law of gravitational force states that ____.

Mutual gravitation is ____.

How did Newton clarify prior laws of planetary motion?

A(n) ____ orbit is one where the orbiting object is always above the same location on Earth's surface.

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

According to the inverse square law, the force due to gravity between two masses will ____.

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

Here and Now

A Users Guide to the Sky

Moon Phases and Eclipses

Origins of Modern Astronomy

Light and Telescopes

Atoms and Spectra

The Sun

The Family of Stars

The Interstellar Medium

Formation and Structure of Stars

Stellar Evolution

Deaths of Stars

Neutron Stars and Black Holes

The Milky Way Galaxy

Galaxies

Supermassive Black Holes and Active Galaxies

Modern Cosmology

Origin of the Solar System and Extrasolar Planets

Earth the Active Planet

The Moon and Mercury

Venus and Mars

Jupiter and Saturn

Uranus Neptune Pluto and the Kuiper Belt

Meteorites Asteroids and Comets

Astrobiology

Filters

The of an object is a measure of the amount of matter it contains. The is a measure of the gravitational force on an object.

If the orbital velocity of the Moon is 1.0 km/s, what is the orbital velocity of a satellite that is 1/16th as far from Earth as the Moon? Hints: There is a long way and a short way to do this calculation. $v _ { c } = \sqrt { \frac { G M } { r } }$ ; G = 6.67 10^-11 m³/s²/kg