Question 1

What do the Copernican and Ptolemaic models have in common?

Accepted Answer

A)  elliptical orbits 
B)  Sun as center of the universe 
C)  circular orbits 
D)  Earth as center of universe 
A)  elliptical orbits 
B)  Sun as center of the universe 
C)  circular orbits 
D)  Earth as center of universe

Question 2

An object in a circular orbit is in a perpetual state of free fall,i.e.,accelerating toward Earth but never reaching it.Explain.

Accepted Answer

The acceleration of the object is such t

Question 3

If a 100-kg asteroid collides with Earth,causing the asteroid to decelerate in 1 second from 1,000 m/s to 0 m/s,what acceleration will Earth experience according to Newton's third law? (Earth has a mass of approximately 6 × 10²⁴ kg.)

Accepted Answer

According to Newton's third law,the forc

Question 4

What information would you need to obtain about one of the moons of the planet Jupiter in order to measure the mass of Jupiter?

Accepted Answer

You would need to know the sem

Question 5

In the figure below,if the woman pushes with a force of 50 N,what will be the acceleration of the container?

Accepted Answer

A)  0.5 m/s2 
B)  0.75 m/s2 
C)  1 m/s2 
D)  2 m/s2 
A)  0.5 m/s2 
B)  0.75 m/s2 
C)  1 m/s2 
D)  2 m/s2

Question 6

What two pieces of information do we need to know about Earth in order to calculate the mass of the Sun?

Accepted Answer

A)  The semimajor axis of Earth's orbit and the mass of Earth. 
B)  The semimajor axis of Earth's orbit and Earth's orbital period. 
C)  The radius of Earth and Earth's orbital period. 
D)  The radius of Earth and the mass of Earth. 
A)  The semimajor axis of Earth's orbit and the mass of Earth. 
B)  The semimajor axis of Earth's orbit and Earth's orbital period. 
C)  The radius of Earth and Earth's orbital period. 
D)  The radius of Earth and the mass of Earth.

Question 7

In which of the following situations would the object be experiencing an unbalanced force?

Accepted Answer

A)  a truck at rest 
B)  a car moving at constant speed turning a corner 
C)  a rocket moving at a constant speed straight up away from Earth 
D)  a car moving at a constant speed toward the right 
A)  a truck at rest 
B)  a car moving at constant speed turning a corner 
C)  a rocket moving at a constant speed straight up away from Earth 
D)  a car moving at a constant speed toward the right

Question 8

Which observations made by Galileo are inconsistent with the geocentric model of astronomy?

Accepted Answer

A)  craters on the Moon 
B)  orbits of Jupiter's moons and phases of Venus 
C)  retrograde motion of Mars 
D)  sunspots 
A)  craters on the Moon 
B)  orbits of Jupiter's moons and phases of Venus 
C)  retrograde motion of Mars 
D)  sunspots

Question 9

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 unless acted upon by an external force. 
A)  eventually come to rest. 
B)  experience an unbalanced force. 
C)  experience a nonzero acceleration. 
D)  stay in motion unless acted upon by an external force.

Question 10

How much would the force of gravity at the surface of the Earth differ if Earth's volume were increased 125 times while its mass was increased 25 times?

Accepted Answer

A)  25 times less 
B)  no difference 
C)  25 times larger 
D)  125 times less 
A)  25 times less 
B)  no difference 
C)  25 times larger 
D)  125 times less

Question 11

Which of the following properties of an astronaut changes when he or she is standing on the Moon,relative to when the astronaut is standing on Earth?

Accepted Answer

A)  weight 
B)  mass 
C)  inertia 
D)  all of the above 
A)  weight 
B)  mass 
C)  inertia 
D)  all of the above

Question 12

If you weighed 150 lb on Earth,what would you weigh on Mars? For reference,Mars has a mass that is 0.1 times Earth's mass,and Mars has a radius that is 0.5 times Earth's radius.

Accepted Answer

A)  30 lb 
B)  110 lb 
C)  76 lb 
D)  60 lb 
A)  30 lb 
B)  110 lb 
C)  76 lb 
D)  60 lb

Question 13

If the distance between Earth and the Sun were cut in half,the gravitational force between these two objects would:

Accepted Answer

A)  decrease by 4. 
B)  decrease by 2. 
C)  increase by 2. 
D)  increase by 4. 
A)  decrease by 4. 
B)  decrease by 2. 
C)  increase by 2. 
D)  increase by 4.

Question 14

What type of orbit results when a satellite has a velocity greater than the escape velocity?

Accepted Answer

A)  unbound 
B)  bound 
C)  circular 
D)  linear 
A)  unbound 
B)  bound 
C)  circular 
D)  linear

Question 15

Once a satellite's velocity at closest approach equals or exceeds the ________ velocity,it is in an unbound orbit.

Accepted Answer

A)  tangential 
B)  linear 
C)  circular 
D)  escape 
A)  tangential 
B)  linear 
C)  circular 
D)  escape

Question 16

According to Newton's third law,forces come in pairs.Two forces in the figure below are labeled.Label the other half of the pairs.

Accepted Answer

For the force of the rope,they

Question 17

If an object is moving in a circular orbit at a constant speed,which of the following is FALSE?

Accepted Answer

A)  Its acceleration is not zero. 
B)  Its acceleration is zero. 
C)  Its velocity is not zero. 
D)  There is an unbalanced force acting on it. 
A)  Its acceleration is not zero. 
B)  Its acceleration is zero. 
C)  Its velocity is not zero. 
D)  There is an unbalanced force acting on it.

Question 18

Your weight is directly proportional to your:

Accepted Answer

A)  height. 
B)  age. 
C)  mass. 
D)  altitude. 
A)  height. 
B)  age. 
C)  mass. 
D)  altitude.

Question 19

What is required to change an object's motion?

Accepted Answer

An unbalan

Question 20

Astronauts orbiting Earth in a spacecraft feel weightless in space because:

Accepted Answer

A)  they are farther away from Earth. 
B)  they eat less food while in orbit. 
C)  the added gravitational pull of the Moon balances Earth's gravitational pull. 
D)  they are in constant free fall around Earth. 
A)  they are farther away from Earth. 
B)  they eat less food while in orbit. 
C)  the added gravitational pull of the Moon balances Earth's gravitational pull. 
D)  they are in constant free fall around Earth.

What do the Copernican and Ptolemaic models have in common?

An object in a circular orbit is in a perpetual state of free fall,i.e.,accelerating toward Earth but never reaching it.Explain.

If a 100-kg asteroid collides with Earth,causing the asteroid to decelerate in 1 second from 1,000 m/s to 0 m/s,what acceleration will Earth experience according to Newton's third law? (Earth has a mass of approximately 6 × 10²⁴ kg.)

What information would you need to obtain about one of the moons of the planet Jupiter in order to measure the mass of Jupiter?

In the figure below,if the woman pushes with a force of 50 N,what will be the acceleration of the container?

What two pieces of information do we need to know about Earth in order to calculate the mass of the Sun?

In which of the following situations would the object be experiencing an unbalanced force?

Which observations made by Galileo are inconsistent with the geocentric model of astronomy?

Newton's first law states that objects in motion:

How much would the force of gravity at the surface of the Earth differ if Earth's volume were increased 125 times while its mass was increased 25 times?

Which of the following properties of an astronaut changes when he or she is standing on the Moon,relative to when the astronaut is standing on Earth?

If you weighed 150 lb on Earth,what would you weigh on Mars? For reference,Mars has a mass that is 0.1 times Earth's mass,and Mars has a radius that is 0.5 times Earth's radius.

If the distance between Earth and the Sun were cut in half,the gravitational force between these two objects would:

What type of orbit results when a satellite has a velocity greater than the escape velocity?

Once a satellite's velocity at closest approach equals or exceeds the ________ velocity,it is in an unbound orbit.

According to Newton's third law,forces come in pairs.Two forces in the figure below are labeled.Label the other half of the pairs.

If an object is moving in a circular orbit at a constant speed,which of the following is FALSE?

Your weight is directly proportional to your:

What is required to change an object's motion?

Astronauts orbiting Earth in a spacecraft feel weightless in space because:

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters

Exam 3: Laws of Motion

What do the Copernican and Ptolemaic models have in common?

An object in a circular orbit is in a perpetual state of free fall,i.e.,accelerating toward Earth but never reaching it.Explain.

If a 100-kg asteroid collides with Earth,causing the asteroid to decelerate in 1 second from 1,000 m/s to 0 m/s,what acceleration will Earth experience according to Newton's third law? (Earth has a mass of approximately 6 × 10²⁴ kg.)

What information would you need to obtain about one of the moons of the planet Jupiter in order to measure the mass of Jupiter?

In the figure below,if the woman pushes with a force of 50 N,what will be the acceleration of the container?

What two pieces of information do we need to know about Earth in order to calculate the mass of the Sun?

In which of the following situations would the object be experiencing an unbalanced force?

Which observations made by Galileo are inconsistent with the geocentric model of astronomy?

Newton's first law states that objects in motion:

How much would the force of gravity at the surface of the Earth differ if Earth's volume were increased 125 times while its mass was increased 25 times?

Which of the following properties of an astronaut changes when he or she is standing on the Moon,relative to when the astronaut is standing on Earth?

If you weighed 150 lb on Earth,what would you weigh on Mars? For reference,Mars has a mass that is 0.1 times Earth's mass,and Mars has a radius that is 0.5 times Earth's radius.

If the distance between Earth and the Sun were cut in half,the gravitational force between these two objects would:

What type of orbit results when a satellite has a velocity greater than the escape velocity?

Once a satellite's velocity at closest approach equals or exceeds the ________ velocity,it is in an unbound orbit.

According to Newton's third law,forces come in pairs.Two forces in the figure below are labeled.Label the other half of the pairs.

If an object is moving in a circular orbit at a constant speed,which of the following is FALSE?

Your weight is directly proportional to your:

What is required to change an object's motion?

Astronauts orbiting Earth in a spacecraft feel weightless in space because:

Thinking Like an Astronomer

Patterns in the Skymotions of Earth and the Moon

Light and Telescopes

The Formation of Stars and Planets

Terrestrial Worlds in the Inner Solar System

Atmospheres of Venus, earth, and Mars

The Giant Planets

Small Bodies of the Solar System

Measuring the Stars

Our Star: the Sun

Evolution of Low-Mass Stars

Evolution of High-Mass Stars

Measuring Galaxies

Our Galaxy: the Milky Way

The Evolution of the Universe

Formation of Structure

Life in the Universe

Filters