Mathematical and Physical Journal
for High Schools
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Problem M. 299. (October 2009)

M. 299. Measure the coefficient of dynamic friction between a sponge and a sheet of glass in case of different forces with which the sponge and the glass are pushed together. Investigate the dry and the wet sponges as well.

(6 pont)

Deadline expired on November 10, 2009.


25 students sent a solution.
6 points:Budai Ádám, Janosov Milán, Márta Zsolt, Szabó 928 Attila.
5 points:Barta Szilveszter Marcell, Batki Bálint, Greksza Máté Attila, Majernyik Noel, Mészáros Benedek.
4 points:4 students.
3 points:6 students.
2 points:2 students.
1 point:2 students.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, October 2009