AnswersDISD CR Physics 2020-2021Universal Law of Gravitation

Universal Law of Gravitation Answers

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Review the table detailing the mass of Jupiter’s moons and their distance from the planet.

Question illustration
A
Io
B
Europa
C
Ganymede
D
Callisto
3
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The acceleration due to gravity on Jupiter is 23.1 m/s2, which is about twice the acceleration due to gravity on Neptune.

A
An object weighs about one-fourth as much on Jupiter as on Neptune.
B
An object weighs about one-half as much on Jupiter as on Neptune.
C
An object weighs about two times as much on Jupiter as on Neptune.
D
An object weighs about four times as much on Jupiter as on Neptune.
4

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A
2.86
B
3.24
C
4.16
D
5.44
5

Which changes would result in a decrease in the gravitational force between two objects? Check all that apply.

A
increasing the distance between the objects
B
decreasing the distance between the objects
C
increasing the mass of one of the objects
D
increasing the mass of both objects
E
decreasing the mass of one of the objects
F
decreasing the mass of both objects
6

How is the gravitational force related to the distance between two objects?

A
It is directly proportional to the square of the distance.
B
It is inversely proportional to the square of the distance.
C
It is directly proportional to the distance.
D
It is inversely proportional to the distance.
7

The gravitational force between a satellite and Earth’s moon is 324 N. The mass of the moon is 7.3 × 1022 kg.

A
1.7 × 10–4 kg
B
2.2 × 10–3 kg
C
230 kg
D
450 kg
8

Which are the effects of gravity on objects on the surface of Earth? Select 2 options.

A
Objects “fall” toward the center of Earth.
B
Objects are pulled by Earth but do not pull on Earth.
C
Objects accelerate at a rate of 9.8 m/s each second.
D
Objects travel at a rate of 9.8 m/s toward the center of Earth.
E
Objects pull on the Earth is much stronger than the Earth’s pull on the object.
10

Neptune has a mass that is about 17 times the mass of Earth. The distance between the Sun and Neptune is about 30.1 times the distance between the Sun and Earth.If the gravitational force between the Sun and Earth is 3.5 x 1028 N, which is closest to the force between Neptune and the Sun?

A
6 x N
Option A
B
6 x N
Option B
C
6 x N
Option C
D
6 x N
Option D

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