AnswersEarth and Space ScienceUniversal Gravitation

Universal Gravitation — Quiz Answers

9 verified answers
1
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Which statement best explains why eclipses can be predicted centuries in advance?

A
Gravitational forces between the Sun and Earth are the same as between the Sun and Moon.
B
The Moon's orbit slows gradually, which affects its future position.
C
The Sun's energy output follows a repeating cycle of emissions.
D
The orbital paths of celestial bodies are stable and can be precisely modeled.
2
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A satellite is moved from 6,800 km to 13,600 km from Earth. What is the effect on gravitational force?

A
It is halved.
B
It is quadrupled.
C
It is doubled.
D
It is quartered.
3

A student claims that if the International Space Station's (ISS) mass was doubled, then the gravitational force between it and Earth would double. Choose the correct answer from each drop-down menu to complete the statement.

Answer:

correct|gravitational force is directly proportional to both masses

5

Engineers are modeling the trajectory of a satellite around Earth using Newton's law of universal gravitation. In their calculations, they mistakenly enter the satellite's mass as 1,000 kg instead of its correct mass of 100 kg. The simulation uses the force value from the universal gravitation equation to guide the satellite's thrusters and orientation. What is the most likely result of this error?

A
The small distance compensates for the error, so the orbit remains stable.
B
The trajectory is overly corrected, sending the probe into a different orbit.
C
The probe's thrust is too weak, causing it to spiral into Earth.
D
The probe remains in orbit due to inertia alone.
6

Which statement best explains why gravity is considered a centripetal force in our solar system?

A
It directs force outward, away from the Sun.
B
It pushes planets forward along their orbital path.
C
It repels objects toward the edge of the solar system.
D
It pulls planets inward, keeping them on a curved path.
7

Choose the correct answer from each drop-down menu to complete the statement.

Answer:

Phobos|a short orbital period|its close distance

8

Why does Io experience approximately 365 eclipses per year?

A
Its short orbital period leads to frequent passes through Jupiter's shadow.
B
It is farther from Jupiter than most other moons.
C
It is the largest moon in the solar system, so it blocks the most sunlight.
D
Its orbit is unpredictable due to volcanic activity.
9

What would most likely happen to the frequency of eclipses caused by the Moon if its orbital period were to increase?

A
The number of eclipses would remain the same because Earth's rotation would not change.
B
The number of eclipses would increase because it would spend more time near Earth.
C
The number of eclipses would decrease due to fewer orbital alignments per year.
D
The number of eclipses would increase because the Moon would orbit faster.
10

What pattern is observed in this data?

A
Celestial bodies with greater mass experience more frequent eclipses.
B
Shorter orbital periods are associated with more frequent eclipses.
C
Celestial bodies farther from their planet orbit more quickly and eclipse more often.
D
The number of eclipses increases with the average orbital distance.

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