rocket vs. jet

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On the long horizontal test track at Edwards AFB, both rocket and jet motors can be tested. On a certain day, a rocket motor, started from rest, accelerated constantly until its fuel was exhausted, after which it ran at constant speed. It was observed that this exhaustion of fuel took place as the rocket passed the midpoint of the measured test distance. The jet motor was started from rest down the track, with a constant acceleration for the entire distance. It was observed that both rocket and jet motors covered the test distance in exactly the same time. What was the ratio of acceleration of the jet motor of that of the rocket motor?


Solutions (listed by author)


Rudy Arthur (pdf, 24K)

Michael A. Gottlieb (pdf, 21K)

Riccardo Borghi (pdf, 104K)


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