Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation

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Problem P. 4157. (April 2009)

P. 4157. What is the least horizontal force which can turn over a cube which is on a horizontal tabletop? Examine the following three cases:

a) $\mu$ $\approx$ 0;

b) $\mu$ =0.2;

c) $\mu$ =1.

(5 pont)

Deadline expired on May 11, 2009.

Statistics:

73 students sent a solution.

5 points: Béres Bertold, Budafoki Richárd Gergely, Farkas Martin, Kaposvári István, Laczkó Zoltán Balázs, Szenczi Zoltán, Wang Daqian.

4 points: Batki Bálint, Egyed Zsombor, Emroz Khan, Illés Dorottya, Mayer Martin János, Nagy 111 Miklós, Najbauer Eszter Éva, Schwarcz Gergő, Somogyi József, Virágh Eszter.

3 points: 28 students.

2 points: 2 students.

1 point: 11 students.

0 point: 7 students.

Unfair, not evaluated: 8 solutionss.

Problems in Physics of KöMaL, April 2009

73 students sent a solution.
5 points:	Béres Bertold, Budafoki Richárd Gergely, Farkas Martin, Kaposvári István, Laczkó Zoltán Balázs, Szenczi Zoltán, Wang Daqian.
4 points:	Batki Bálint, Egyed Zsombor, Emroz Khan, Illés Dorottya, Mayer Martin János, Nagy 111 Miklós, Najbauer Eszter Éva, Schwarcz Gergő, Somogyi József, Virágh Eszter.
3 points:	28 students.
2 points:	2 students.
1 point:	11 students.
0 point:	7 students.
Unfair, not evaluated:	8 solutionss.