Escape Velocity
Escape velocity from spherical planet (mass M radius R) is:
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About This Question
- Subject
- physics
- Chapter
- gravitation
- Topic
- escape velocity
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
√(2GM/R)
Escape velocity (ve) is the minimum speed needed for an object to escape the gravitational influence of a planet.
- Using conservation of energy: Total energy at surface = Total energy at infinity (0). 21mve2−RGMm=0 ve=R2GM
- For Earth, ve≈11.2 km/s.
This easy difficulty physics question is from the chapter gravitation, covering the topic of escape velocity. It appeared in the 2025 exam.
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