When a body is lifted to twice earth's radius above the surface of the earth, the value of g decreases by:
Correct answer: D. Nine times
- A. Two times
- B. Three times
- C. Six times
- D. Nine times
Explanation
D is correct. g= GM/r 2 , as the distance is increased from R to 3R so g' will be =GM/9r2 As a result g' will be 9 times less than g.
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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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