Practice question · Numerical answer
Achilles runs at 10 metres per second and the tortoise at 1 metre per second with a 100 metre head start. After how many seconds does Achilles draw level?
Hints
- Achilles gains on the tortoise at the difference of their speeds.
- He must make up 100 m at a closing speed of 9 m/s.
Show the answer
11.11 (answers within ±0.2 count)
Why
The closing speed is m/s over a 100 m gap, so s. The catch-up happens at a perfectly definite moment. Zeno’s infinite subdivision describes only the time before it.
Practise Zeno and Melissus
The app has 4 more questions on this lesson, and keeps your place in the course. Philosophy I is free to start.
More questions on Zeno and Melissus
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