Mathematical and Physical Journal
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Problem P. 4382. (November 2011)

P. 4382. The bob of a 2-m long pendulum undergoes circular motion in a horizontal plane. At most how long does it take to cover a complete circle?

(4 pont)

Deadline expired on December 12, 2011.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. $\displaystyle T\le 2\pi \sqrt{{\ell}/{g}}=2{,}83$ s.

Statistics:

 127 students sent a solution. 4 points: 82 students. 3 points: 18 students. 2 points: 10 students. 1 point: 12 students. 0 point: 5 students.

Problems in Physics of KöMaL, November 2011