Week 9: Powered Ascent

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After World War II, rocketry's story splits into two very different paths: weapons and space exploration. From here on, our series follows the space race — starting with the basic motion every launch begins with.

History

The postwar years saw captured German rocket technology and scientists fuel both the American and Soviet space programs, setting up the competition that would define the next two decades.

Forces

While a motor burns with roughly steady thrust, a rocket experiences roughly constant acceleration — meaning its velocity and position during powered flight can be predicted with straightforward kinematics.

Math

v = v0 + a·t,   x = x0 + v0·t + ½·a·t²

Worked example (metric): starting from rest with an acceleration of 50 m/s² for 1 second: v = 50 m/s, and x = 0 + 0 + 0.5 × 50 × 1² = 25 m.

Safety Note

This is exactly why we never chase a rocket during powered flight — it's still accelerating and its path isn't fully predictable if anything goes wrong. Always wait until the field is clear.