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Two items to get sqrt of 2 (Posted on 2016-07-19) Difficulty: 2 of 5
Evaluate an approximate value of sqrt(2), using a sneaker and a stopwatch only.

Source: Mark Levi's "Why Cats Land On Their Feet?"

  Submitted by Ady TZIDON    
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Solution: (Hide)
Mark Levi's solution:
Suspend the sneaker by its lace to make a pendulum. Using the stopwatch, record the number of swings it makes in one minute, and call this n1.
Double the lace to halve its length and again record the number of swings in one minute. Call this n2.
Now sqrt{2}=n2/n1
For better precision, record the number of swings over a longer period of time.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Questionre(3): another way(s).....how to walk?Ady TZIDON2016-07-27 09:26:30
re(2): another way(s)Jer2016-07-26 09:49:15
Hints/Tipsre: another way(s)Ady TZIDON2016-07-26 04:36:06
Solutionanother wayCharlie2016-07-19 10:42:59
SolutionShoes land on their feet. A solution.Jer2016-07-19 10:28:08
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