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A rocket must be fast enough never to fall back to Earth. That speed is called the:
AExtreme speed
BEscape speed
CEscort speed
DEstimate speed
Answer & Solution
Correct answer: B. Escape speed
1. A slower object falls back or orbits.
2. A simulator lets you raise the speed to find it.
3. It is the escape speed.
_Source: OpenStax Astronomy 2e, Chapter 3, Orbits and Gravity._
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