What is the escape speed (in km/s) from an Earth-like planet with mass 6.5e+24 kg and radius 55.0 × 105 m?
Use the gravitational constant G = 6.67 × 10-11 m3 kg-1 s-2.
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Use the gravitational constant G = 6.67 × 10-11 m3 kg-1 s-2.
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Using the same formula you gave in your other question:
sqrt (2 × (6.67 × 10^-11 m3 kg^-1 s^-2) × (6.5 × 10^24 kg) / (55.0 × 10^5 m)) = 12556 m/s = 12.6 km/s