AnswersSLPS-2001310-EarthSpace B -GFClassification of Living Things

Orbital Motion Answers

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Which object would be considered to be in free fall?

A
one that experiences both friction and centripetal force
B
one that is truly weightless
C
one that is slowed down by air resistance
D
one with only gravity acting upon it
2
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Once an object enters orbit, what keeps the object moving sideways?

A
inertia
B
gravity
C
centripetal force
D
air resistance
3

A group of scientists is trying to launch an object into orbit, and the object is traveling at 6500 m/s. Which best explains why the object will not successfully orbit Earth?

A
There is not enough air resistance to keep the object moving.
B
There is not enough friction to keep the object moving.
C
The object is not traveling fast enough to match Earth’s curvature.
D
The object is traveling too fast to match Earth’s curvature.
4

The orbital period of an object is 2 × 107 s and its total radius is 4 × 1010 m. The tangential speed of the satellite is m/s. (Round to the nearest whole number, do not add any punctuation.)

Answer not available
5

Why are satellites placed into orbit at least 150 km above Earth’s surface?

A
to avoid air resistance
B
to match Earth’s curvature
C
to create inertia
D
to increase friction
6

Which formula can be used to find the tangential speed of an orbiting object?

A
v =
Option A
B
v =
Option B
C
v = G
Option C
D
v = r
Option D
7

Which best explains why astronauts appear weightless when they are in a space shuttle orbiting Earth?

A
They are falling toward Earth at the same rate as the space shuttle.
B
They are falling toward Earth at a faster rate than the space shuttle.
C
They are too far from Earth to experience gravity.
D
They are too far from Earth to experience air resistance.
8

decreasesincreasescontinuously fluctuatesstays constant

A
decreases
B
increases
C
continuously fluctuates
D
stays constant
9

What causes a satellite to move tangentially to a circular path?

A
air resistance
B
friction
C
inertia
D
gravity
10

Lexy used the formula shown to calculate the force of gravity on a space shuttle.Fg = G

Question illustration
A
the difference between Earth’s mass and the space shuttle’s mass
B
the sum of Earth’s mass and the space shuttle’s mass
C
the mass of Earth
D
the mass of the space shuttle

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