Escape speed from Earth is about
1) 8 km/s.
2) 11.2 km/s.
3) more than 11.2 km/s.
Interestingly, if a stone released at rest at the far edge of the solar system drops to Earth by virtue of only Earth gravity, it will strike Earth's surface with a speed of about
4) 8 m/s.
5) 10 km/s.
6) 11.2 km/s.
7) more than 11.2 km/s.
Answer: 2, 6
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