Multiple Choice Identify the choice that best completes the
statement or answers the question.

A
B
C
D
E
1.

The orbital speed for a satellite orbiting very close to Earth's surface is
_____.

a.

1600 m/s b.

4900 m/s c.

8000
m/s d.

16,000 m/s e.

80,000 m/s

A
B
C
D
E
2.

The reason satellites orbit Earth at least 150 km above the surface is to
_____.

a.

be above Earth's gravity b.

make sure they are higher than the highest
mountains c.

be above Earth's atmosphere d.

keep them out of the way of commercial
airliners. e.

all of the above

A
B
C
3.

The speed of a satellite in a circular orbit is _____.

a.

constant b.

not constant c.

constantly
increasing

A
B
C
4.

The speed of a satellite in an elliptical orbit is _____.

a.

independent of the height of the satellite b.

not
constant c.

constant

A
B
C
D
E
5.

A period of a satellite is defined as _____.

a.

the time for a satellite to cross the United States b.

1
second c.

the time for a satellite to make one complete revolution around
Earth d.

90 seconds e.

24 hours

A
B
C
D
E
6.

The higher a satellite is, the _____.

a.

less its speed is b.

greater its speed is c.

longer its period
is d.

both A and C e.

both B and C

A
B
C
D
7.

The fastest moving planet in a solar system is _____.

a.

the most massive planet b.

any planet (they all move at the same
speed) c.

the smallest planet d.

the planet nearest the
sun

A
B
C
8.

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

a.

the moon b.

Earth c.

neither Earth nor
the moon

A
B
C
D
9.

Compared to the period of a satellite in orbit close to Earth, the period of a
satellite in orbit far from Earth is _____.

a.

the same b.

longer c.

shorter d.

Not enough
information

A
B
C
D
E
10.

Where does a satellite in an elliptical orbit have the greatest kinetic
energy?

a.

At the point closest to the planet b.

Exactly at the point halfway to the
planet c.

At the point farthest from the planet d.

Anywhere -- its kinetic energy is
constant e.

More information is needed

A
B
C
D
E
11.

Where does a satellite in a circular orbit have the greatest kinetic
energy?

a.

At the point farthest from the planet b.

Exactly at the point halfway to the
planet c.

At the point closest to the planet d.

Anywhere—its kinetic energy is
constant e.

More information is needed

A
B
C
D
E
12.

What remains constant for a satellite in an elliptical orbit?

a.

Its speed b.

Its potential energy c.

Its total
energy d.

Its kinetic energy e.

Its distance from the
planet

A
B
C
13.

Minimal orbital speed about Earth is approximately 8 km/s. Minimal orbital speed
about the moon would be _____.

a.

less than 8 km/s b.

about 8 km/s c.

more than 8
km/s

A
B
C
D
14.

As a satellite is moving in orbit around the Earth, the sum of the kinetic
energy and potential energy everywhere is _______ .

a.

decreasing. c.

constant. b.

increasing. d.

zero.

A
B
C
D
15.

Which of the following describes how circular and elliptical satellite orbits
vary?

a.

In a circular orbit, both the distance to Earth and the speed of the satellite vary.
In an elliptical orbit, neither the distance to Earth nor the speed of the satellite
vary. b.

In a circular orbit, neither the distance to Earth nor the speed of the satellite
vary. In an elliptical orbit, both the distance to Earth and the speed of the satellite
vary. c.

In both a circular orbit and an elliptical orbit, both the distance to Earth and the
speed of the satellite vary. d.

In both a circular orbit and an elliptical
orbit, neither the distance to Earth nor the speed of the satellite
vary.