Problem M. 317. (October 2011)

M. 317. Cut sectors of different central angles $\alpha$ and of radius a=10 cm from A4 sheets of paper, and carefully fold and glue them such that they form right circular cones. The gained cones have different vertex angles, Let $\varphi$ be the half of the vertex angle. If they are dropped from a great height they will fall with constant speed. Measure how this terminal speed depends on the half of the vertex angle $\varphi$ .

(6 pont)

Deadline expired on November 10, 2011.

Statistics:

27 students sent a solution.

6 points: Juhász Péter, Kovács 444 Áron, Szabó 928 Attila, Szigeti Bertalan György.

5 points: Barta Szilveszter Marcell, Jenei Márk, Pálfi Nikolett, Pataki Bálint Ármin, Tilk Bence.

4 points: 7 students.

3 points: 3 students.

2 points: 2 students.

1 point: 2 students.

0 point: 4 students.

Problems in Physics of KöMaL, October 2011

27 students sent a solution.
6 points:	Juhász Péter, Kovács 444 Áron, Szabó 928 Attila, Szigeti Bertalan György.
5 points:	Barta Szilveszter Marcell, Jenei Márk, Pálfi Nikolett, Pataki Bálint Ármin, Tilk Bence.
4 points:	7 students.
3 points:	3 students.
2 points:	2 students.
1 point:	2 students.
0 point:	4 students.

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