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Greg Egan
[1/3] From the 007 training manual, p 1731, scenario 87B. You wake from a drug-induced stupor, locked in a dome-shaped cage. On top of the cage, a horizontal beam is rotating around a pivot, and attached to it is another beam, of equal length, trailing behind it as it turns.
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Greg Egan Dec 25
Replying to @gregeganSF
[2/3] The villain explains that if the first beam turns at the correct rate, the second one will maintain an angle of close to 90°, preventing the attached booby trap from exploding. Currently a clockwork mechanism is turning the first beam, but it is about to cut out …
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Greg Egan Dec 25
Replying to @gregeganSF
[3/3] … so you must take over its role, by turning a handle that protrudes into your cage. If the rate of rotation when you take over is that of a clock’s minute hand, what is the absolute maximum time you could keep up the task, before rescue or other intervention was needed?
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Greg Egan Dec 26
Replying to @gregeganSF
The correct answer was the first option: about 9 minutes.
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