The true statements about gravitational force are:
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It is directed inward from the center of an object. - True. Gravitational force is attractive and acts toward the center of the masses involved.
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It gets stronger as two objects are brought closer together. - True. The gravitational force increases as the distance between the two objects decreases, according to Newton's law of universal gravitation.
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It exists between any pair of objects. - True. Gravitational force exists between any two objects with mass, regardless of whether they are touching or not.
The following statements are not true:
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It is directed outward from the center of an object. - False. Gravitational force is always an attractive force directed inward.
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It gets weaker as the mass of an object decreases. - False. While the gravitational force depends on the masses of the objects and the distance between them, the strength of the gravitational force doesn't inherently decrease just because one of the masses is smaller; it simply affects the magnitude of the force according to the mass involved.
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It exists only between objects that are touching one another. - False. Gravitational force exists between any two objects with mass, regardless of the distance between them, as long as they are not infinitely far apart.
So, the correct answers are:
- It is directed inward from the center of an object.
- It gets stronger as two objects are brought closer together.
- It exists between any pair of objects.