Mathematical and Physical Journal
for High Schools
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Problem P. 4166. (May 2009)

P. 4166. A clever astronaut rotates a necklace in the spaceship, such that it has a circular shape, and turns twice in each second. Calculate the tension in the necklace. The mass of the necklace is 3 grams, and the radius of the circle is 7 cm.

(4 pont)

Deadline expired on June 11, 2009.


Statistics:

79 students sent a solution.
4 points:Bodosi Eszter, Boros Csanád Örs, Borsos 607 Zalán, Börcsök Bence, Budai Ádám, Csengeri Béla, Deák Zsolt, Emroz Khan, Ercsey Tamás, Filep Tibor, Galzó Ákos Ferenc, Hegedűs Csaba, Illés Dorottya, Iván Dávid, Jéhn Zoltán, Kovács 646 Soma, Kovács Márk, Laczkó Zoltán Balázs, Lászlóffy András, Lovas Lia Izabella, Maknics András, Márkus Bence Gábor, Mayer Martin János, Najbauer Eszter Éva, Neumer Tamás, Pálovics Péter, Paripás Viktor, Pázmán Koppány, Rácz Viktor, Szédelyi Roland, Szenczi Zoltán, Tóth 222 Barnabás, Trényi Róbert, Vörös Beáta, Wang Daqian.
3 points:Barancsuk Lilla, Béres Bertold, Greksza Máté Attila, Lőrincz Dóra, Para Attila, Patartics Bálint, Tamási Mátyás, Varju 105 Tamás, Zelei Kristóf.
1 point:28 students.
0 point:4 students.
Unfair, not evaluated:3 solutions.

Problems in Physics of KöMaL, May 2009