Question 1

An object moving on a circle at constant speed is an example of accelerated motion.

Accepted Answer

A) True 
 B)False

Question 2

A 200-kg spacecraft is launched to the Moon. After it has landed on the Moon, its mass is ____.

Accepted Answer

A)  zero 
B)  200 kg 
C)  about 1/6its mass onEarth 
D)  The answer depends on which side of the Moon the spacecraft landed on 
A)  zero 
B)  200 kg 
C)  about 1/6its mass onEarth 
D)  The answer depends on which side of the Moon the spacecraft landed on

Question 3

A 200-kg spacecraft is launched to the Moon.After it has landed on the Moon, its weight is ____.

Accepted Answer

A)  zero 
B)  200 kg 
C)  about 1/6its mass onEarth 
D)  The answer depends on which side of the Moon the spacecraft landed on 
A)  zero 
B)  200 kg 
C)  about 1/6its mass onEarth 
D)  The answer depends on which side of the Moon the spacecraft landed on

Question 4

It is possible to use Newton's modification to Kepler's Third law to determine the mass of Jupiter's moon, Io.

Accepted Answer

A) True 
 B)False

Question 5

A satellite is moved from a low orbit to one that is twice as far from Earth.Its weight at its new orbit is ____.

Accepted Answer

A)  unchanged 
B)  decreased by a factor of 2 
C)  decreased by a factor of 4 
D)  There is no gravity in space. 
E)  increased by a factor of 2 
A)  unchanged 
B)  decreased by a factor of 2 
C)  decreased by a factor of 4 
D)  There is no gravity in space. 
E)  increased by a factor of 2

Question 6

Suppose that the Sun started shrinking in size, without losing any mass. What would be the effect of the Sun's change on the orbits of the planets?

Accepted Answer

A)  The orbits would become smaller in size. 
B)  The orbits would become larger. 
C)  The orbits would not be affected. 
D)  The planets would escape. 
A)  The orbits would become smaller in size. 
B)  The orbits would become larger. 
C)  The orbits would not be affected. 
D)  The planets would escape.

Question 7

What is Newton's First law of motion?

Accepted Answer

A)  A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it. 
B)  Force equals mass times acceleration, F=ma. 
C)  Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. 
D)  When two bodies interact, they create equal and opposite forces on each other. 
A)  A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it. 
B)  Force equals mass times acceleration, F=ma. 
C)  Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. 
D)  When two bodies interact, they create equal and opposite forces on each other.

Question 8

An object is moving in a straight line and at a constant speed of 60 kilometers per hour. We therefore conclude that the net force on this object is zero.

Accepted Answer

A) True 
 B)False

Question 9

By Newton's Third law, Earth's pull on the Moon is equal to the Moon's pull on Earth.

Accepted Answer

A) True 
 B)False

Question 10

The surface gravity of Jupiter is only 2.5 times larger than Earth's, despite the fact that Jupiter's mass is more than 300 times that of Earth. How can this be?

Accepted Answer

A)  The radius of Jupiter is much larger than Earth's, so a point in the cloud tops of Jupiter is farther from its center. 
B)  The radius of Earth is 300 times smaller than the radius of Jupiter. 
C)  Jupiter is mostly hydrogen and helium, while Earth is mostly iron and rock. 
D)  Jupiter has no surface, so it does not have a surface gravity. 
A)  The radius of Jupiter is much larger than Earth's, so a point in the cloud tops of Jupiter is farther from its center. 
B)  The radius of Earth is 300 times smaller than the radius of Jupiter. 
C)  Jupiter is mostly hydrogen and helium, while Earth is mostly iron and rock. 
D)  Jupiter has no surface, so it does not have a surface gravity.

Question 11

What is Newton's Second law of motion?

Accepted Answer

A)  A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it. 
B)  Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. 
C)  Force equals mass times acceleration, F=ma. 
D)  When two bodies interact, they create equal and opposite forces on each other. 
A)  A body continues in a state of rest or uniform motion in a straight line unless made to change that state by forces acting on it. 
B)  Every mass exerts a force on any other mass that is proportional to the product of the masses divided by the square of the distance between them. 
C)  Force equals mass times acceleration, F=ma. 
D)  When two bodies interact, they create equal and opposite forces on each other.

Question 12

Consider a large truck and a small car driving up a straight, steep hill. The truck is moving at 60 miles per hour and the car at 30 miles per hour. Assuming that the speeds are constant, which of the two vehicles experiences a larger net force?

Accepted Answer

A)  the truck 
B)  the car 
C)  the same: zero net force 
A)  the truck 
B)  the car 
C)  the same: zero net force

Question 13

If you are lucky enough to get a chance to visit different planets of our Solar System, which of the following statements will be true?

Accepted Answer

A)  Your weight will change, but your mass will remain the same. 
B)  Your mass will change, but your weight will remain the same. 
C)  Both your weight and mass will remain the same. 
D)  Both your weight and mass will change. 
A)  Your weight will change, but your mass will remain the same. 
B)  Your mass will change, but your weight will remain the same. 
C)  Both your weight and mass will remain the same. 
D)  Both your weight and mass will change.

Question 14

A parachutist jumps out of an airplane and opens her parachute.She then floats downward at a constant rate. Why is she not accelerating?

Accepted Answer

A)  The parachute provides an upward force to balance gravity, so the net force is zero. 
B)  She is accelerating, but gravity's pull is weak at high altitudes. 
C)  As she falls, she is weightless and therefore cannot accelerate. 
D)  The parachute has very little mass, so its inertia is negligible. 
E)  The parachutist exerts a gravitational pull on Earth that is equal to its pull on her. 
A)  The parachute provides an upward force to balance gravity, so the net force is zero. 
B)  She is accelerating, but gravity's pull is weak at high altitudes. 
C)  As she falls, she is weightless and therefore cannot accelerate. 
D)  The parachute has very little mass, so its inertia is negligible. 
E)  The parachutist exerts a gravitational pull on Earth that is equal to its pull on her.

Question 15

What property summarizes a body's tendency to stay in the state of rest or motion?

Accepted Answer

A)  temperature 
B)  acceleration 
C)  pressure 
D)  inertia 
E)  volume 
A)  temperature 
B)  acceleration 
C)  pressure 
D)  inertia 
E)  volume

Question 16

A car is moving down a straight, steep hill. By applying the brake, the driver is able to keep the speed of the car constant. Which of the following statements is true in this situation?

Accepted Answer

A)  There is a net force on the car. 
B)  The net acceleration is negative. 
C)  There is no net force on the car. 
D)  The net acceleration is positive. 
A)  There is a net force on the car. 
B)  The net acceleration is negative. 
C)  There is no net force on the car. 
D)  The net acceleration is positive.

Question 17

An astronaut on the Moon drops a feather and a hammer at the same time.Which hits the ground first?

Accepted Answer

A)  The hammer hits first due to its larger mass. 
B)  The feather hits first due to the decreased weight of the hammer. 
C)  The feather hits first since there is no air resistance on the Moon. 
D)  The feather and the hammer hit the ground at the same time. 
A)  The hammer hits first due to its larger mass. 
B)  The feather hits first due to the decreased weight of the hammer. 
C)  The feather hits first since there is no air resistance on the Moon. 
D)  The feather and the hammer hit the ground at the same time.

Question 18

The speed an object needs to move away from the gravitational pull of Earth is called

Accepted Answer

A)  orbital velocity. 
B)  escape velocity. 
C)  rotational velocity. 
D)  random velocity. 
A)  orbital velocity. 
B)  escape velocity. 
C)  rotational velocity. 
D)  random velocity.

Question 19

If the net force acting on an object doubles, then the _____ doubles as well.

Accepted Answer

A)  mass 
B)  acceleration 
C)  speed 
D)  velocity 
A)  mass 
B)  acceleration 
C)  speed 
D)  velocity

Question 20

A 200-kg spacecraft is launched to the Moon.While in orbit around the Moon, its weight is ____.

Accepted Answer

A)  zero 
B)  200 kg 
C)  about 1/6th its weight at Earth 
D)  The answer depends on how close to the Moon the ship is orbiting 
A)  zero 
B)  200 kg 
C)  about 1/6th its weight at Earth 
D)  The answer depends on how close to the Moon the ship is orbiting

An object moving on a circle at constant speed is an example of accelerated motion.

A 200-kg spacecraft is launched to the Moon. After it has landed on the Moon, its mass is ____.

A 200-kg spacecraft is launched to the Moon.After it has landed on the Moon, its weight is ____.

It is possible to use Newton's modification to Kepler's Third law to determine the mass of Jupiter's moon, Io.

A satellite is moved from a low orbit to one that is twice as far from Earth.Its weight at its new orbit is ____.

Suppose that the Sun started shrinking in size, without losing any mass. What would be the effect of the Sun's change on the orbits of the planets?

What is Newton's First law of motion?

An object is moving in a straight line and at a constant speed of 60 kilometers per hour. We therefore conclude that the net force on this object is zero.

By Newton's Third law, Earth's pull on the Moon is equal to the Moon's pull on Earth.

The surface gravity of Jupiter is only 2.5 times larger than Earth's, despite the fact that Jupiter's mass is more than 300 times that of Earth. How can this be?

What is Newton's Second law of motion?

Consider a large truck and a small car driving up a straight, steep hill. The truck is moving at 60 miles per hour and the car at 30 miles per hour. Assuming that the speeds are constant, which of the two vehicles experiences a larger net force?

If you are lucky enough to get a chance to visit different planets of our Solar System, which of the following statements will be true?

A parachutist jumps out of an airplane and opens her parachute.She then floats downward at a constant rate. Why is she not accelerating?

What property summarizes a body's tendency to stay in the state of rest or motion?

A car is moving down a straight, steep hill. By applying the brake, the driver is able to keep the speed of the car constant. Which of the following statements is true in this situation?

An astronaut on the Moon drops a feather and a hammer at the same time.Which hits the ground first?

The speed an object needs to move away from the gravitational pull of Earth is called

If the net force acting on an object doubles, then the _____ doubles as well.

A 200-kg spacecraft is launched to the Moon.While in orbit around the Moon, its weight is ____.

The Cycles of the Sky

The Rise of Astronomy

Light and Atoms

Telescopes

Earth

The Moon

Survey of Solar Systems

The Terrestrial Planets

The Outer Planets

Small Bodies Orbiting the Sun

The Sun, Our Star

Measuring the Properties of Stars

Stellar Evolution

Stellar Remnants: White Dwarfs, Neutron Stars, and Black Holes

The Milky Way Galaxy

Galaxies

Cosmology

Filters

Exam 3: Gravity and Motion

An object moving on a circle at constant speed is an example of accelerated motion.

A 200-kg spacecraft is launched to the Moon. After it has landed on the Moon, its mass is ____.

A 200-kg spacecraft is launched to the Moon.After it has landed on the Moon, its weight is ____.

It is possible to use Newton's modification to Kepler's Third law to determine the mass of Jupiter's moon, Io.

A satellite is moved from a low orbit to one that is twice as far from Earth.Its weight at its new orbit is ____.

Suppose that the Sun started shrinking in size, without losing any mass. What would be the effect of the Sun's change on the orbits of the planets?

What is Newton's First law of motion?

An object is moving in a straight line and at a constant speed of 60 kilometers per hour. We therefore conclude that the net force on this object is zero.

By Newton's Third law, Earth's pull on the Moon is equal to the Moon's pull on Earth.

The surface gravity of Jupiter is only 2.5 times larger than Earth's, despite the fact that Jupiter's mass is more than 300 times that of Earth. How can this be?

What is Newton's Second law of motion?

Consider a large truck and a small car driving up a straight, steep hill. The truck is moving at 60 miles per hour and the car at 30 miles per hour. Assuming that the speeds are constant, which of the two vehicles experiences a larger net force?

If you are lucky enough to get a chance to visit different planets of our Solar System, which of the following statements will be true?

A parachutist jumps out of an airplane and opens her parachute.She then floats downward at a constant rate. Why is she not accelerating?

What property summarizes a body's tendency to stay in the state of rest or motion?

A car is moving down a straight, steep hill. By applying the brake, the driver is able to keep the speed of the car constant. Which of the following statements is true in this situation?

An astronaut on the Moon drops a feather and a hammer at the same time.Which hits the ground first?

The speed an object needs to move away from the gravitational pull of Earth is called

If the net force acting on an object doubles, then the _____ doubles as well.

A 200-kg spacecraft is launched to the Moon.While in orbit around the Moon, its weight is ____.

The Cycles of the Sky

The Rise of Astronomy

Light and Atoms

Telescopes

Earth

The Moon

Survey of Solar Systems

The Terrestrial Planets

The Outer Planets

Small Bodies Orbiting the Sun

The Sun, Our Star

Measuring the Properties of Stars

Stellar Evolution

Stellar Remnants: White Dwarfs, Neutron Stars, and Black Holes

The Milky Way Galaxy

Galaxies

Cosmology

Filters