If M is the mass and R is the radius of the earth, then which one of the following equations correctly relates the universal gravitational constant G to the acceleration of free fall g at the surface of the Earth?
Correct answer: C. Option C
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
Option C is correct as it is the appropriate rearrangement of the formula.
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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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