AnswersCrowley Credit Recovery Physics AUniversal Law of Gravitation

Universal Law of Gravitation Answers

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1
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The universal law of gravitation states that the force of attraction between two objects depends on which quantities?

A
the masses of the objects and their densities
B
the distance between the objects and their shapes
C
the densities of the objects and their shapes
D
the masses of the objects and the distance between them
2
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In the equation for the gravitational force between two objects, which quantity must be squared?

A
m1
B
m2
C
G
D
d
3

A probe orbiting Venus exerts a gravitational force of 2.58 × 103 N on Venus. Venus has a mass of 4.87 × 1024 kg. The mass of the probe is 655 kilograms. The gravitational constant is 6.67 × 10-11 N*m2/kg2.To three significant digits, the probe is × 106 m from the center of Venus.

Answer not available
4

The gravitational force between two objects is 3600 N. What will be the gravitational force between the objects if the mass of each object is reduced to one-third of its original mass?

A
400 N
B
1200 N
C
10,800 N
D
32,400 N
5

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
6

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
7

The gravitational force between Pluto and Charon is 3.61 × 1018 N. Pluto has a mass of 1.3 × 1022 kg, which is only slightly greater than Charon’s mass of 1.6 × 1021 kg.

A
2.0 × 107 m
B
2.4 × 1012 m
C
3.8 × 1014 m
D
5.8 × 1024 m
8

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.
9

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
10

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
11

Which are the effects of gravity on objects on the surface of Earth? Select 2 options.Objects “fall” toward the center of Earth.Objects are pulled by Earth but do not pull on Earth. Objects accelerate at a rate of 9.8 m/s each second.Objects travel at a rate of 9.8 m/s toward the center of Earth.Objects pull on the Earth is much stronger than the Earth’s pull on the object.

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.
12

The mass of Mars is 6.42 × 1023 kg. Its moon Phobos is 9378 kilometers away from Mars and has a mass of 1.06 × 1016 kg.

A
5.16 × 1015 N
B
5.16 × 1021 N
C
4.84 × 1022 N
D
4.84 × 1025 N
13

The image shows a model of the gravitational field around Earth.

Question illustration
A
The field exerts an attractive force only outside of the ring of arrows that point toward Earth’s surface.
B
The field exerts an attractive force only within the ring of arrows that point toward Earth’s surface.
C
The strength of the field increases as you get farther from Earth, as shown by the larger spaces between the circles.
D
The strength of the field increases as you get closer to Earth, as shown by the smaller spaces between the circles.

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