Question 1

An object in a closed orbit under the influence of an attractive force that follows the inverse square law must behave a(n) _______________ path.

Accepted Answer

The answer of An object in a closed orbit under...

Question 2

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 3

The energy involved in the gravitational attraction between a planet and the Sun is called _______ energy.

Accepted Answer

A)  potential 
B)  kinetic 
C)  thermal 
D)  equilibrium 
E)  orbital 
A)  potential 
B)  kinetic 
C)  thermal 
D)  equilibrium 
E)  orbital

Question 4

The escape velocity of a planet which is twice the mass of the Earth is ______ times the escape velocity of the Earth.

Accepted Answer

A)    
B)    
C)  2 
D)  4 
E)  8 
A)    
B)    
C)  2 
D)  4 
E)  8

Question 5

The radius of Earth is 6,378 km. The force of gravity on a 1-kg ball at Earth's surface is 9.8 kg m/s2.  What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67 × 10-11 m3/s2/kg

Accepted Answer

A)  2.45 kg m/s2 
B)  4.9 kg m/s2 
C)  9.8 kg m/s2 
D)  19.6 kg m/s2 
E)  39.2 kg m/s2 
A)  2.45 kg m/s2 
B)  4.9 kg m/s2 
C)  9.8 kg m/s2 
D)  19.6 kg m/s2 
E)  39.2 kg m/s2

Question 6

Newton's third law states that forces occur in pairs acting in the same direction.

Accepted Answer

A) True 
 B)False

Question 7

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. 
  ; 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 8

Kinetic energy refers to the energy of a(n) ____.

Accepted Answer

A)  stationary body 
B)  moving body 
C)  moon 
D)  gravitational field 
E)  object due to its position 
A)  stationary body 
B)  moving body 
C)  moon 
D)  gravitational field 
E)  object due to its position

Question 9

When two objects of unequal mass orbit each other, the center of mass is ____.

Accepted Answer

A)  at the center of the more massive object 
B)  at the center of the least massive object 
C)  half way between the centers of each object 
D)  always closer to the less massive of the two objects 
E)  always closer to the more massive of the two objects 
A)  at the center of the more massive object 
B)  at the center of the least massive object 
C)  half way between the centers of each object 
D)  always closer to the less massive of the two objects 
E)  always closer to the more massive of the two objects

Question 10

Galileo determined that ____.

Accepted Answer

A)  heavy objects accelerate at a slower speed than lighter objects 
B)  lighter objects accelerate at a slower speed than heavier objects 
C)  an object's acceleration is due to the height from which it is dropped 
D)  all objects fall at a constant speed 
E)  all objects fall at a constant acceleration 
A)  heavy objects accelerate at a slower speed than lighter objects 
B)  lighter objects accelerate at a slower speed than heavier objects 
C)  an object's acceleration is due to the height from which it is dropped 
D)  all objects fall at a constant speed 
E)  all objects fall at a constant acceleration

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

Perigee is the point in ____.

Accepted Answer

A)  the Moon's orbit when the Moon is farthest from Earth 
B)  an object's orbit around Earth when the object is closest to Earth 
C)  an object's orbit around Earth when the object is closest to the Sun 
D)  a planet's orbit when the planet is closest to its sun 
E)  a planet's orbit when the planet is farthest from its sun 
A)  the Moon's orbit when the Moon is farthest from Earth 
B)  an object's orbit around Earth when the object is closest to Earth 
C)  an object's orbit around Earth when the object is closest to the Sun 
D)  a planet's orbit when the planet is closest to its sun 
E)  a planet's orbit when the planet is farthest from its sun

Question 13

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 14

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 15

Newton's second law of motion is represented by ____.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 16

The first postulate of special relativity states that ____.

Accepted Answer

A)  observers can always detect their uniform motion relative to other objects 
B)  observers can never detect their uniform motion except relative to other objects 
C)  the speed of light is constant regardless of location 
D)  the speed of light in a vacuum is constant 
E)  energy equals mass multiplied by the speed of light, squared 
A)  observers can always detect their uniform motion relative to other objects 
B)  observers can never detect their uniform motion except relative to other objects 
C)  the speed of light is constant regardless of location 
D)  the speed of light in a vacuum is constant 
E)  energy equals mass multiplied by the speed of light, squared

Question 17

How did Newton clarify prior laws of planetary motion?

Accepted Answer

Newton's understanding of gravity allowe

Question 18

The escape velocity at a given distance from a planet is less than the circular velocity of an orbit around that planet at the same distance.

Accepted Answer

A) True 
 B)False

Question 19

What is the escape velocity from the Moon for a lunar landing module sitting on the Moon's surface? Hints:   ;
The mass of the Moon is 7.2 × 1022 kg; its radius is 1738 km; G = 6.67 × 10-11 m3/s2/kg

Accepted Answer

A)  2.3 m/s 
B)  23 m/s 
C)  2.3 km/s 
D)  11 km/s 
E)  23 km/s 
A)  2.3 m/s 
B)  23 m/s 
C)  2.3 km/s 
D)  11 km/s 
E)  23 km/s

Question 20

Explain why the spring and neap tides occur periodically.

Accepted Answer

Gravity is universal, so the Sun also pr

An object in a closed orbit under the influence of an attractive force that follows the inverse square law must behave a(n) _______________ path.

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

The energy involved in the gravitational attraction between a planet and the Sun is called _______ energy.

The escape velocity of a planet which is twice the mass of the Earth is ______ times the escape velocity of the Earth.

The radius of Earth is 6,378 km. The force of gravity on a 1-kg ball at Earth's surface is 9.8 kg m/s². What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67 × 10^-11 m³/s²/kg

Newton's third law states that forces occur in pairs acting in the same direction.

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. ; G = 6.67 × 10^-11 m³/s²/kg

Kinetic energy refers to the energy of a(n) ____.

When two objects of unequal mass orbit each other, the center of mass is ____.

Galileo determined that ____.

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.

Perigee is the point in ____.

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

Spring tides occur ____.

Newton's second law of motion is represented by ____.

The first postulate of special relativity states that ____.

How did Newton clarify prior laws of planetary motion?

The escape velocity at a given distance from a planet is less than the circular velocity of an orbit around that planet at the same distance.

What is the escape velocity from the Moon for a lunar landing module sitting on the Moon's surface? Hints: ; The mass of the Moon is 7.2 × 10²² kg; its radius is 1738 km; G = 6.67 × 10^-11 m³/s²/kg

Explain why the spring and neap tides occur periodically.

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

An object in a closed orbit under the influence of an attractive force that follows the inverse square law must behave a(n) _______________ path.

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

The energy involved in the gravitational attraction between a planet and the Sun is called _______ energy.

The escape velocity of a planet which is twice the mass of the Earth is ______ times the escape velocity of the Earth.

The radius of Earth is 6,378 km. The force of gravity on a 1-kg ball at Earth's surface is 9.8 kg m/s2. What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67 × 10-11 m3/s2/kg

Newton's third law states that forces occur in pairs acting in the same direction.

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. ; G = 6.67 × 10-11 m3/s2/kg

Kinetic energy refers to the energy of a(n) ____.

When two objects of unequal mass orbit each other, the center of mass is ____.

Galileo determined that ____.

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.

Perigee is the point in ____.

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

Spring tides occur ____.

Newton's second law of motion is represented by ____.

The first postulate of special relativity states that ____.

How did Newton clarify prior laws of planetary motion?

The escape velocity at a given distance from a planet is less than the circular velocity of an orbit around that planet at the same distance.

What is the escape velocity from the Moon for a lunar landing module sitting on the Moon's surface? Hints: ; The mass of the Moon is 7.2 × 1022 kg; its radius is 1738 km; G = 6.67 × 10-11 m3/s2/kg

Explain why the spring and neap tides occur periodically.

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

The radius of Earth is 6,378 km. The force of gravity on a 1-kg ball at Earth's surface is 9.8 kg m/s². What is the force of gravity on this same ball when the ball is located 12,756 km from Earth's center? Hint: G = 6.67 × 10^-11 m³/s²/kg

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. ; G = 6.67 × 10^-11 m³/s²/kg

What is the escape velocity from the Moon for a lunar landing module sitting on the Moon's surface? Hints: ; The mass of the Moon is 7.2 × 10²² kg; its radius is 1738 km; G = 6.67 × 10^-11 m³/s²/kg