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Universal Law of Gravitation 222
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The mass of the Sun is 1.99 × 1030 kg. Jupiter is 7.79 × 108 km away from the Sun and has a mass of 1.90 × 1027 kg.
The gravitational force between the Sun and Jupiter to three significant figures is
4.16 x 10^23 N
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.
What is the gravitational force between Mars and Phobos?
5.16 × 1015 N
5.16 × 1021 N
4.84 × 1022 N
4.84 × 1025 N
5.16 × 10^15 N
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.
9.08
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?
400 N
1200 N
10,800 N
32,400 N
400 N
The image shows a model of the gravitational field around Earth.
Which best describes the model?
The field exerts an attractive force only outside of the ring of arrows that point toward Earth's surface.
The field exerts an attractive force only within the ring of arrows that point toward Earth's surface.
The strength of the field increases as you get farther from Earth, as shown by the larger spaces between the circles.
The strength of the field increases as you get closer to Earth, as shown by the smaller spaces between the circles.
The strength of the field increases as you get closer to Earth, as shown by the smaller spaces between the circles.
The gravitational force between two objects is 45,000 N. What will be the gravitational force between the two objects if the distance between the objects is reduced by one-half?
11,250 N
22,500 N
90,000 N
180,000 N
180,000 N
Which changes would result in a decrease in the gravitational force between two objects? Check all that apply.
increasing the distance between the objects
decreasing the distance between the objects
increasing the mass of one of the objects
increasing the mass of both objects
decreasing the mass of one of the objects
decreasing the mass of both objects
increasing the distance between the objects
decreasing the mass of one of the objects
decreasing the mass of both objects
The gravitational force between two objects is 2000 N. The mass of each object is reduced to one-third of its original mass.
How must the distance between the objects change to keep the gravitational force between them 2000 N?
The distance must be one-ninth the original distance.
The distance must be one-third the original distance.
The distance must be three times greater.
The distance must be nine times greater.
The distance must be one-third the original distance.
What is the downward pull on an object due to gravity?
mass
weight
acceleration
velocity
weight
The gravitational force between two objects is 2400 N. What will be the gravitational force between the objects if the mass of one object is doubled?
600 N
1200 N
4800 N
9600 N
4800 N
The acceleration due to gravity on Jupiter is 23.1 m/s2, which is about twice the acceleration due to gravity on Neptune.
Which statement accurately compares the weight of an object on these two planets?
An object weighs about one-fourth as much on Jupiter as on Neptune.
An object weighs about one-half as much on Jupiter as on Neptune.
An object weighs about two times as much on Jupiter as on Neptune.
An object weighs about four times as much on Jupiter as on Neptune.
An object weighs about two times as much on Jupiter as on Neptune.
The gravitational force between two objects is
⇒ proportional to the product of the masses of the objects.
directly
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.
How far apart are Pluto and Charon?
2.0 × 107 m
2.4 × 1012 m
3.8 × 1014 m
5.8 × 1024 m
2.0 x 10^7 m
How is the gravitational force related to the distance between two objects?
It is directly proportional to the square of the distance.
It is inversely proportional to the square of the distance.
It is directly proportional to the distance.
It is inversely proportional to the distance.
It is inversely proportional to the square of the distance.
A baseball has a mass of 0.145 kilograms, and a bowling ball has a mass of 6.8 kilograms. What is the gravitational force between them if their centers are 0.5 m apart?
1.0 × 10-13 N
1.3 × 10-10 N
2.6 × 10-10 N
1.1 × 10-8 N
2.6 × 10-10 N
What is an effect of gravity on objects on the surface of Earth? Check all that apply.
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 are pulled by Earth more strongly than they pull on Earth.
Objects "fall" toward the center of Earth.
Objects accelerate at a rate of 9.8 m/s each second.
Which equation is used to calculate the weight of an object on a planet?
w = mg
w = mG
w =
w =
w = mg
Review the table detailing the mass of Jupiter's moons and their distance from the planet.
Which of Jupiter's moons has the greatest gravitational force with Jupiter?
Io
Europa
Ganymede
Callisto
Io
The universal law of gravitation states that the force of attraction between two objects depends on which quantities?
the masses of the objects and their densities
the distance between the objects and their shapes
the densities of the objects and their shapes
the masses of the objects and the distance between them
the masses of the objects and the distance between them
The gravitational force between a satellite and Earth's moon is 324 N. The mass of the moon is 7.3 × 1022 kg.
If the distance from the moon to the satellite is 2.6 × 106 m, what is the mass of the satellite?
1.7 × 10-4 kg
2.2 × 10-3 kg
230 kg
450 kg
450 kg
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