Question 1

Passengers in a high-flying jumbo jet feel their normal weight in flight,whereas passengers in an orbiting space vehicle do not because they are

Accepted Answer

A) beyond the main pull of Earth's gravity. 
B) above the Earth's atmosphere. 
C) without support forces. 
D) all the above 
E) none of the above 
A) beyond the main pull of Earth's gravity. 
B) above the Earth's atmosphere. 
C) without support forces. 
D) all the above 
E) none of the above C

Question 2

Compared to the speed a satellite loses when traveling from nearest to farthest points from Earth,the speed gained when returning from farthest to nearest is

Accepted Answer

A) less. 
B) the same. 
C) more. 
A) less. 
B) the same. 
C) more. B

Question 3

The amount of gravitational force that acts on a space vehicle that orbits Earth is

Accepted Answer

A) nearly zero. 
B) nearly as much as the vehicle's weight on Earth's surface. 
C) the same as the vehicle's weight on Earth's surface. 
A) nearly zero. 
B) nearly as much as the vehicle's weight on Earth's surface. 
C) the same as the vehicle's weight on Earth's surface. B

Question 4

An object is placed exactly halfway between the Earth and the Moon.The object will fall toward the

Accepted Answer

A) Earth. 
B) Moon. 
C) neither 
A) Earth. 
B) Moon. 
C) neither

Question 5

One second after a ball rolls off the edge of a horizontal surface at a speed of 10 m/s,

Accepted Answer

A) its vertical component of velocity is 10 m/s. 
B) its speed is about 14 m/s. 
C) both of these 
D) none of the above 
A) its vertical component of velocity is 10 m/s. 
B) its speed is about 14 m/s. 
C) both of these 
D) none of the above

Question 6

The identities of dark energy and dark matter are

Accepted Answer

A) unknown at this time. 
B) subjects of intense astronomical interest. 
C) both of these 
D) neither of these 
A) unknown at this time. 
B) subjects of intense astronomical interest. 
C) both of these 
D) neither of these

Question 7

After a stone that is thrown straight up reaches the top of its path and then falls downward,its acceleration is

Accepted Answer

A) greater than at the top of its path. 
B) less than at the top of its path. 
C) the same as at the top of its path. 
A) greater than at the top of its path. 
B) less than at the top of its path. 
C) the same as at the top of its path.

Question 8

According to Newton,the greater the distance between gravitationally interacting objects,the

Accepted Answer

A) less the gravitational force between them. 
B) more the gravitational force between them. 
C) constancy of the force between them. 
A) less the gravitational force between them. 
B) more the gravitational force between them. 
C) constancy of the force between them.

Question 9

Air resistance on a high-speed projectile shortens its

Accepted Answer

A) range. 
B) maximum height. 
C) both of these 
D) none of the above 
A) range. 
B) maximum height. 
C) both of these 
D) none of the above

Question 10

If Earth's mass decreased to one-half its original mass with no change in radius,your weight would

Accepted Answer

A) decrease to one-quarter. 
B) decrease to one-half. 
C) remain the same. 
D) none of the above 
A) decrease to one-quarter. 
B) decrease to one-half. 
C) remain the same. 
D) none of the above

Question 11

For each 8-km segment of a satellite in close Earth orbit,the "drop" toward Earth is about

Accepted Answer

A) 5 m. 
B) 10 m. 
C) also 8 km. 
A) 5 m. 
B) 10 m. 
C) also 8 km.

Question 12

A projectile is launched at an angle of 15° above the horizontal and lands downrange.With no air resistance,what other projection angle for the same speed would produce the same downrange distance?

Accepted Answer

A) 30° 
B) 45° 
C) 50° 
D) 75° 
E) 90° 
A) 30° 
B) 45° 
C) 50° 
D) 75° 
E) 90°

Question 13

Minimal orbit speed about Earth is about 8 km/s.Minimal orbital speed for a satellite about the Moon would be

Accepted Answer

A) less than 8 km/s. 
B) greater than 8 km/s. 
C) about 8 km/s. 
A) less than 8 km/s. 
B) greater than 8 km/s. 
C) about 8 km/s.

Question 14

Two motorcycle stunt drivers,one light and the other much heavier,ride their motorcycles up and off an inclined ramp at identical speeds.They both rise in the air and land downrange.Neglecting air resistance,the one to attain the greatest height and greatest range is the

Accepted Answer

A) light driver. 
B) heavy driver. 
C) both the same 
A) light driver. 
B) heavy driver. 
C) both the same

Question 15

A projectile is launched straight upward at 50 m/s.Neglecting air resistance its speed upon returning to its starting point is

Accepted Answer

A) less than 50 m/s. 
B) 50 m/s. 
C) more than 50 m/s. 
A) less than 50 m/s. 
B) 50 m/s. 
C) more than 50 m/s.

Question 16

You experience weightlessness

Accepted Answer

A) in the absence of a supporting surface. 
B) momentarily when you step off a chair. 
C) in a freely falling elevator. 
D) all of the above 
A) in the absence of a supporting surface. 
B) momentarily when you step off a chair. 
C) in a freely falling elevator. 
D) all of the above

Question 17

Without air resistance,a projectile fired horizontally at 8 km/s from a mountain top will

Accepted Answer

A) accelerate downward at g as it moves horizontally. 
B) trace a curve that matches Earth's curvature. 
C) return to its starting position and repeat its falling behavior. 
D) all the above 
E) none of the above 
A) accelerate downward at g as it moves horizontally. 
B) trace a curve that matches Earth's curvature. 
C) return to its starting position and repeat its falling behavior. 
D) all the above 
E) none of the above

Question 18

Consider two planets in space that gravitationally attract each other.If the masses of both planets are doubled,and the distance between them doesn't change,then the force between them is

Accepted Answer

A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above 
A) one-quarter. 
B) half as much. 
C) twice as much. 
D) four times as much. 
E) none of the above

Question 19

Inside a freely-falling elevator you would have no

Accepted Answer

A) gravitational force on you. 
B) weight. 
C) both of these 
D) none of the above 
A) gravitational force on you. 
B) weight. 
C) both of these 
D) none of the above

Question 20

From Earth,one satellite appears to overtake another.The faster satellite that is seen to overtake the other is

Accepted Answer

A) higher. 
B) lower. 
C) can't say 
A) higher. 
B) lower. 
C) can't say

Exam 4: Gravity, Projectiles, and Satellites

Passengers in a high-flying jumbo jet feel their normal weight in flight,whereas passengers in an orbiting space vehicle do not because they are

Compared to the speed a satellite loses when traveling from nearest to farthest points from Earth,the speed gained when returning from farthest to nearest is

The amount of gravitational force that acts on a space vehicle that orbits Earth is

An object is placed exactly halfway between the Earth and the Moon.The object will fall toward the

One second after a ball rolls off the edge of a horizontal surface at a speed of 10 m/s,

The identities of dark energy and dark matter are

After a stone that is thrown straight up reaches the top of its path and then falls downward,its acceleration is

According to Newton,the greater the distance between gravitationally interacting objects,the

Air resistance on a high-speed projectile shortens its

If Earth's mass decreased to one-half its original mass with no change in radius,your weight would

For each 8-km segment of a satellite in close Earth orbit,the "drop" toward Earth is about

A projectile is launched at an angle of 15° above the horizontal and lands downrange.With no air resistance,what other projection angle for the same speed would produce the same downrange distance?

Minimal orbit speed about Earth is about 8 km/s.Minimal orbital speed for a satellite about the Moon would be

Two motorcycle stunt drivers,one light and the other much heavier,ride their motorcycles up and off an inclined ramp at identical speeds.They both rise in the air and land downrange.Neglecting air resistance,the one to attain the greatest height and greatest range is the

A projectile is launched straight upward at 50 m/s.Neglecting air resistance its speed upon returning to its starting point is

You experience weightlessness

Without air resistance,a projectile fired horizontally at 8 km/s from a mountain top will

Consider two planets in space that gravitationally attract each other.If the masses of both planets are doubled,and the distance between them doesn't change,then the force between them is

Inside a freely-falling elevator you would have no

From Earth,one satellite appears to overtake another.The faster satellite that is seen to overtake the other is

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

Atoms and the Periodic Table

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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