Acceleration Due To Gravity
Value of g at height h above Earth (R radius) approximately is:
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About This Question
- Subject
- physics
- Chapter
- gravitation
- Topic
- acceleration due to gravity
- Difficulty
- Medium
- Year
- 2025
Solution
Correct Answer:
g(R/(R+h))2
The acceleration due to gravity (g) at the surface is g=R2GM.
- At a height h above the surface, the distance from the center is (R+h).
- The value gh=(R+h)2GM.
- Taking the ratio: ggh=(R+h)2R2=(R+hR)2.
- For h≪R, this simplifies using binomial expansion to gh≈g(1−R2h).
This medium difficulty physics question is from the chapter gravitation, covering the topic of acceleration due to gravity. It appeared in the 2025 exam.
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