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The escape velocity on the surface of earth is 11.2 km/s. What would be the escape velocity on the surface of another planet of the same mass but 1/4 times the radius of the earth?
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- 22.4 km/s
- 44.8 km/s
- 5.6 km/s
- 11.2 km/s
Correct Option: A
vearth = √2GMe / Re
∴ vplanet = 2 × vearth = 2 × 11.2 = 22.4 km/s
