Force is _ proportional to the square of the distance between the centers of the masses of two objects:
Correct answer: B. Inversely
- A. Directly
- B. Inversely
- C. Gravitation
- D. None of these
Explanation
The force between two objects is inversely proportional to the square of the distance between their centers of mass. This statement is known as Newton's law of universal gravitation. Mathematically, the law is expressed as: F= Gm1m2/r2 where: ( F ) is the gravitational force between the two objects, ( G ) is the gravitational constant, ( m1 ) and ( m2 ) are the masses of the two objects, and ( r ) is the distance between the centers of mass of the two objects.
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About Gravitation
Newton’s law of universal gravitation relates the force between masses to their masses and separation, while gravitational field strength explains weight and orbital motion. The topic covers satellite velocity and period, escape ideas, weightlessness in free fall, and artificial gravity, which differs from ordinary gravitational attraction.
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