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Military rockets of the 1800s achieved velocities on the order of 100 meters per second. Robert Goddard achieved mach 1 (about 350 m/sec) with his rockets. To escape the gravity of our Earth, a rocket would need to achieve a velocity of about 11,000 m/sec. The X-15 rocket plane achieved a speed of over 110,000 meters per second.

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13y ago

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