Question 1

What acceleration would result from a 5-N force acting on a 3-kg object? (Recall that 1 N = 1 kg m/s2. )

Accepted Answer

a = F/m = 5N/3 kg = 1.67 m/s²

Question 2

Which of the following are superior planets?

Accepted Answer

A) Mars 
B) Earth and Venus 
C) Venus,Mars,Jupiter,and Saturn 
D) Earth,Jupiter,and Saturn 
E) Mars,Jupiter,and Saturn 
A) Mars 
B) Earth and Venus 
C) Venus,Mars,Jupiter,and Saturn 
D) Earth,Jupiter,and Saturn 
E) Mars,Jupiter,and Saturn E

Question 3

If you travel 20 miles from home to school in 30 minutes,what is your average velocity?

Accepted Answer

A) 20 mph 
B) 40 mph 
C) 0.7 mph 
D) 5 mph 
E) 600 mph 
A) 20 mph 
B) 40 mph 
C) 0.7 mph 
D) 5 mph 
E) 600 mph B

Question 4

Even though they move at faster average speeds,the outer planets in the Solar System have longer periods than the inner planets.

Accepted Answer

A) True 
 B)False

Question 5

In terms of frames of reference,explain why an object moving in a straight line at constant speed remains in motion.

Accepted Answer

There is no difference between rest and

Question 6

Explain how the Occam's razor argument influenced whether people believed in the heliocentric or the geocentric model of the Solar System.

Accepted Answer

Occam's razor is the argument that the s

Question 7

Kepler's third law says that a comet with a period of 160 years will have a semimajor axis of:

Accepted Answer

A) 30 AU 
B) 50 AU 
C) 90 AU 
D) 140 AU 
E) 210 AU 
A) 30 AU 
B) 50 AU 
C) 90 AU 
D) 140 AU 
E) 210 AU

Question 8

In the ________ model of the Solar System,________ motion is only an apparent,not a real,motion.

Accepted Answer

A) geocentric;retrograde 
B) heliocentric;retrograde 
C) geocentric;prograde 
D) heliocentric;prograde e Galilean;prograde 
A) geocentric;retrograde 
B) heliocentric;retrograde 
C) geocentric;prograde 
D) heliocentric;prograde e Galilean;prograde

Question 9

If the synodic period of Venus is observed from Earth to be 1.6 years,Venus' sidereal period is _____ years.

Accepted Answer

A) 1.9 years 
B) 0.45 years 
C) 0.28 years 
D) 1.6 years 
E) 0.62 years 
A) 1.9 years 
B) 0.45 years 
C) 0.28 years 
D) 1.6 years 
E) 0.62 years

Question 10

If you travel at a velocity of 60 mph for a 5-hour trip,how far did you travel?

Accepted Answer

A) 300 miles 
B) 120 miles 
C) 12 miles 
D) 0.4 miles 
E) 240 mph 
A) 300 miles 
B) 120 miles 
C) 12 miles 
D) 0.4 miles 
E) 240 mph

Question 11

Kepler's second law says that if a planet is in an elliptical orbit around a star,then the planet moves fastest when the planet is:

Accepted Answer

A) farthest from the star 
B) closest to the star 
C) exceeding the escape velocity 
D) experiencing zero acceleration 
E) located at one of the foci 
A) farthest from the star 
B) closest to the star 
C) exceeding the escape velocity 
D) experiencing zero acceleration 
E) located at one of the foci

Question 12

What do we customarily call the semimajor axis of a circular orbit? What is the value of the eccentricity of a circle? What might the value of the eccentricity be for a comet on a very elliptical orbit around the Sun?

Accepted Answer

The semimajor axis of a circul

Question 13

Saturn has a semimajor axis of 9.6 AU.How long does it take Saturn to orbit once around the Sun?

Accepted Answer

Using Kepler's third law,P² ∝ A³ and compa

Question 14

If Jupiter has an orbital period of 12 years,what value is closest to its average distance from the Sun?

Accepted Answer

A) 2 AU 
B) 25 AU 
C) 10 AU 
D) 5 AU 
E) 144 AU 
A) 2 AU 
B) 25 AU 
C) 10 AU 
D) 5 AU 
E) 144 AU

Question 15

In the heliocentric system,retrograde motion is not an actual motion of the planet but appears to occur because of the Earth's movement.

Accepted Answer

A) True 
 B)False

Question 16

If you start from rest and accelerate at 10 mph/s and end up traveling at 60 mph,how long did it take?

Accepted Answer

A) 1 seconds 
B) 6 seconds 
C) 600 seconds 
D) 0.6 seconds 
E) 200 seconds 
A) 1 seconds 
B) 6 seconds 
C) 600 seconds 
D) 0.6 seconds 
E) 200 seconds

Question 17

Newton's first law states that objects in motion:

Accepted Answer

A) eventually come to rest 
B) experience an unbalanced force 
C) experience a nonzero acceleration 
D) stay in motion 
E) must be subject to zero friction 
A) eventually come to rest 
B) experience an unbalanced force 
C) experience a nonzero acceleration 
D) stay in motion 
E) must be subject to zero friction

Question 18

If the Sun is located at one focus of Earth's elliptical orbit,what is at the other focus?

Accepted Answer

A) Earth 
B) the Moon 
C) another planet 
D) nothing 
E) Jupiter 
A) Earth 
B) the Moon 
C) another planet 
D) nothing 
E) Jupiter

Question 19

A comet orbits the Sun with a semimajor axis of 90 AU.Using Kepler's third law,the comet's orbital period is approximately

Accepted Answer

A) 850 years 
B) 630 years 
C) 410 years 
D) 180 years 
E) 90 years 
A) 850 years 
B) 630 years 
C) 410 years 
D) 180 years 
E) 90 years

Question 20

A superior planet is one that is:

Accepted Answer

A) smaller than Earth 
B) larger than Earth 
C) closer to the Sun than Earth 
D) farther from the Sun than Earth 
E) made of heavier materials than Earth 
A) smaller than Earth 
B) larger than Earth 
C) closer to the Sun than Earth 
D) farther from the Sun than Earth 
E) made of heavier materials than Earth

Exam 3: Motion of Astronomical Bodies

What acceleration would result from a 5-N force acting on a 3-kg object? (Recall that 1 N = 1 kg m/s2. )

Which of the following are superior planets?

If you travel 20 miles from home to school in 30 minutes,what is your average velocity?

Even though they move at faster average speeds,the outer planets in the Solar System have longer periods than the inner planets.

In terms of frames of reference,explain why an object moving in a straight line at constant speed remains in motion.

Explain how the Occam's razor argument influenced whether people believed in the heliocentric or the geocentric model of the Solar System.

Kepler's third law says that a comet with a period of 160 years will have a semimajor axis of:

In the ________ model of the Solar System,________ motion is only an apparent,not a real,motion.

If the synodic period of Venus is observed from Earth to be 1.6 years,Venus' sidereal period is _____ years.

If you travel at a velocity of 60 mph for a 5-hour trip,how far did you travel?

Kepler's second law says that if a planet is in an elliptical orbit around a star,then the planet moves fastest when the planet is:

What do we customarily call the semimajor axis of a circular orbit? What is the value of the eccentricity of a circle? What might the value of the eccentricity be for a comet on a very elliptical orbit around the Sun?

Saturn has a semimajor axis of 9.6 AU.How long does it take Saturn to orbit once around the Sun?

If Jupiter has an orbital period of 12 years,what value is closest to its average distance from the Sun?

In the heliocentric system,retrograde motion is not an actual motion of the planet but appears to occur because of the Earth's movement.

If you start from rest and accelerate at 10 mph/s and end up traveling at 60 mph,how long did it take?

Newton's first law states that objects in motion:

If the Sun is located at one focus of Earth's elliptical orbit,what is at the other focus?

A comet orbits the Sun with a semimajor axis of 90 AU.Using Kepler's third law,the comet's orbital period is approximately

A superior planet is one that is:

Why Learn Astronomy

Patterns in the Skymotions of Earth

Gravity and Orbits

Light

The Tools of the Astronomer

The Birth and Evolution of Planetary Systems

The Terrestrial Planets and Earths Moon

Atmospheres of the Terrestrial Planets

Worlds of Gas and Liquid the Giant Planets

Planetary Adornments Moons and Rings

Dwarf Planets and Small Solar System Bodies

Taking the Measure of Stars

Our Starthe Sun

Star Formation and the Interstellar Medium

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Relativity and Black Holes

The Expanding Universe

Galaxies

The Milky Waya Normal Spiral Galaxy

Modern Cosmology

Large-Scale Structure in the Universe

Life

Filters

What acceleration would result from a 5-N force acting on a 3-kg object? (Recall that 1 N = 1 kg m/s². )

In the model of the Solar System, motion is only an apparent,not a real,motion.