AnswersPhysics IUniversal Law of Gravitation

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The mass of Mars is 6 point 4 2 times 10 to the 23th power kilograms Its moon Phobos is 9378 kilometers away from Mars and has a mass of 1 point 0 6 times 10 to the 16th power kilograms What is the gravitational force between Mars and Phobos?

A
5 point 1 6 times 10 to the 21th power cap n
B
5 point 1 6 times 10 to the 15th power cap n
C
4 point 8 4 times 10 to the 25th power cap n
D
4 point 8 4 times 10 to the 22th power cap n
3

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

A
It is inversely proportional to the distance.
B
It is directly proportional to the distance.
C
It is inversely proportional to the square of the distance.
D
It is directly proportional to the square of the distance.
5

Which changes would result in a decrease in the gravitational force between two objects? Choose three correct answers.

A
decreasing the mass of one of the objects
B
increasing the mass of both objects
C
increasing the mass of one of the objects
D
decreasing the distance between the objects
E
increasing the distance between the objects
F
decreasing the mass of both objects
7

A baseball has a mass of 0 point 1 4 5 kilograms, and a bowling ball has a mass of 6 point 8 kilograms. What is the gravitational force between them if their centers are 0 point 5 m apart?

A
1 point 0 times 10 to the negative 13 power cap n
B
2 point 6 times 10 to the negative 10 power N
C
1 point 1 times 10 to the negative 8 power cap n
D
1 point 3 times 10 to the negative 10 power cap n
9

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?

A
The distance must be nine times greater.
B
The distance must be three times greater.
C
The distance must be one-third the original distance.
D
The distance must be one-ninth the original distance.

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