The Moon has a radius of 1600 km and a surface gravity of 1.6 m s⁻². What is the escape velocity from the Moon?
Correct answer C. 2263 m s⁻¹
Explanation
Escape velocity is √(2gR) = √(2 × 1.6 × 1.6 × 10⁶) = √(5.12 × 10⁶) ≈ 2263 m s⁻¹, about 2.3 km/s.
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