Question 1

Acceleration is greater for a satellite in elliptical orbit when it is

Accepted Answer

A)  closest to Earth.
B)  farthest from Earth.
C)  the same at both locationsD) All of the above
E) B) and C)

Question 2

An object is thrown vertically into the air.Because of air resistance,the time for its descent will be

Accepted Answer

A)  longer than the ascent time.
B)  shorter than the ascent time.
C)  equal to the ascent time.
D)  not enough informationE) A) and D)
F) B) and C)

Question 3

A woman who normally weighs 400 N stands on top of a very tall ladder so she is one Earth-radius above Earth's surface.What is her weight there?

Accepted Answer

A)  zero
B)  100 N
C)  200 N
D)  400 N
E)  none of the aboveF) None of the above
G) A) and E)

Question 4

Why doesn't the Moon fall toward Earth like apples do?

Accepted Answer

A)  the great distance of the Moon prevents falling
B)  moon's small mass prevents falling
C)  moon does fall but its great distance keeps it from getting closer
D)  moon does fall but due to its tangential motion it also falls around EarthE) None of the above
F) All of the above

Question 5

In the vacuum of outer space far from our Sun,there is no

Accepted Answer

A)  gravity.
B)  atmospheric pressure.
C)  both of these
D)  none of the aboveE) A) and D)
F) B) and D)

Question 6

If your mass doubles,your weight

Accepted Answer

A)  also doubles.
B)  is quadrupled.
C)  remains the same.D) A) and B)
E) All of the above

Question 7

The hang time of an athlete who moves horizontally 2.0 m during a 1.25-m-high jump is

Accepted Answer

A)  less than 1 s.
B)  about 1 s.
C)  more than 1 s.D) None of the above
E) All of the above

Question 8

A lunar month is about 28 days.If the Moon were farther from Earth than it is now,the lunar month would be

Accepted Answer

A)  more than 28 days.
B)  less than 28 days.
C)  about 28 days.D) A) and C)
E) A) and B)

Question 9

How far away from Earth must one travel to completely be beyond Earth's gravity?

Accepted Answer

A)  to a region above the Earth's atmosphere
B)  to a region well beyond the Moon
C)  to a region beyond the solar system
D)  forget it; you can't travel far enoughE) A) and B)
F) B) and C)

Question 10

A hunter fires a bullet from a horizontally-held rifle while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Accepted Answer

A)  the dropped one.
B)  the fired one.
C)  both hit at the same timeD) A) and C)
E) All of the above

Question 11

A hunter aims a rifle at an angle of 10° below the horizontal.The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Accepted Answer

A)  the dropped one.
B)  the fired one.
C)  both hit at the same timeD) B) and C)
E) All of the above

Question 12

Each of us weighs slightly less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

Accepted Answer

A)  gravitational force is shielded inside the building.
B)  mass of the building attracts us upward slightly.
C)  both of these
D)  none of the aboveE) A) and B)
F) A) and C)

Question 13

If the masses of two planets doubles and the distance between them reduces by half,the force between them would be

Accepted Answer

A)  unchanged.
B)  half as much.
C)  twice as much.
D)  four times as much.
E)  none of the aboveF) None of the above
G) A) and D)

Question 14

If the radius of the Earth somehow decreased with no change in mass,your weight would

Accepted Answer

A)  decrease.
B)  increase.
C)  not change.D) All of the above
E) B) and C)

Question 15

A rock is thrown upward at 50° with respect to the horizontal.As it rises,its vertical component of velocity

Accepted Answer

A)  increases.
B)  remains unchanged.
C)  decreases.D) All of the above
E) B) and C)

Question 16

If Earth's mass somehow decreased with no change in its radius,your weight would

Accepted Answer

A)  decrease also.
B)  increase.
C)  remain the same.D) B) and C)
E) All of the above

Question 17

The Sun is spherical due to

Accepted Answer

A)  Earth circling it.
B)  Earth and Moon circling it.
C)  gravitation.
D)  none of the aboveE) A) and B)
F) All of the above

Question 18

An airplane flying overhead drops a care package directly over Mike at rest in his Corvette.Neglecting air resistance,the package will land

Accepted Answer

A)  behind Mike.
B)  upon Mike and his Corvette.
C)  well ahead of Mike and his Corvette.D) B) and C)
E) A) and B)

Question 19

As a bowling ball that rolls off the edge of a table falls,its vertical component of motion

Accepted Answer

A)  decreases.
B)  remains constant.
C)  increases.D) A) and B)
E) A) and C)

Question 20

A hunter aims a rifle at an angle of 10° above the horizontal.The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Accepted Answer

A)  the dropped one.
B)  the fired one.
C)  both hit at the same timeD) A) and C)
E) B) and C)

Exam 4: Gravity, Projectiles, and Satellites

An object is thrown vertically into the air.Because of air resistance,the time for its descent will be

Correct AnswerverifiedShow Answer

Each of us weighs slightly less inside the ground floor of a skyscraper than we do on the ground away from the skyscraper because the

Correct AnswerverifiedShow Answer

As a bowling ball that rolls off the edge of a table falls,its vertical component of motion

Correct AnswerverifiedShow Answer

Why doesn't the Moon fall toward Earth like apples do?

Correct AnswerverifiedShow Answer

A lunar month is about 28 days.If the Moon were farther from Earth than it is now,the lunar month would be

Correct AnswerverifiedShow Answer

In the vacuum of outer space far from our Sun,there is no

Correct AnswerverifiedShow Answer

The hang time of an athlete who moves horizontally 2.0 m during a 1.25-m-high jump is

Correct AnswerverifiedShow Answer

The Sun is spherical due to

Correct AnswerverifiedShow Answer

If your mass doubles,your weight

Correct AnswerverifiedShow Answer

A hunter fires a bullet from a horizontally-held rifle while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Correct AnswerverifiedShow Answer

An airplane flying overhead drops a care package directly over Mike at rest in his Corvette.Neglecting air resistance,the package will land

Correct AnswerverifiedShow Answer

If the masses of two planets doubles and the distance between them reduces by half,the force between them would be

Correct AnswerverifiedShow Answer

Acceleration is greater for a satellite in elliptical orbit when it is

Correct AnswerverifiedShow Answer

A hunter aims a rifle at an angle of 10° above the horizontal.The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Correct AnswerverifiedShow Answer

If the radius of the Earth somehow decreased with no change in mass,your weight would

Correct AnswerverifiedShow Answer

How far away from Earth must one travel to completely be beyond Earth's gravity?

Correct AnswerverifiedShow Answer

A rock is thrown upward at 50° with respect to the horizontal.As it rises,its vertical component of velocity

Correct AnswerverifiedShow Answer

If Earth's mass somehow decreased with no change in its radius,your weight would

Correct AnswerverifiedShow Answer

A woman who normally weighs 400 N stands on top of a very tall ladder so she is one Earth-radius above Earth's surface.What is her weight there?

Correct AnswerverifiedShow Answer

A hunter aims a rifle at an angle of 10° below the horizontal.The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle.The bullet to hit the ground first is

Correct AnswerverifiedShow Answer

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