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Why does a rocket have to go 25,000 mph to escape Earth?

(Version anglaise seulement)

par Benjamin L. Emerson, Principal Research Engineer, School of Aerospace Engineering, Georgia Institute of Technology

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com.

Why does a rocket have to go 25,000 mph (about 40,000 kilometers per hour) to escape Earth? – Bo H., age 10, Durham, New Hampshire

There’s a reason why a rocket has to go so fast to escape Earth. It’s…

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