Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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Problem P. 4719. (March 2015)

P. 4719. A kayaker paddles up the river. The speed of the water is 5 m/s. At what speed should the kayaker paddle if he wants to cover a certain distance with the least work? (The drag force is proportional to the square of the speed.)

(5 pont)

Deadline expired on April 10, 2015.


Statistics:

43 students sent a solution.
5 points:Asztalos Bogdán, Balogh Menyhért, Bartók Imre, Bekes Nándor, Berta Dénes, Blum Balázs, Csathó Botond, Csire Roland, Fekete Balázs Attila, Fekete Panna, Forrai Botond, Fülöp Erik, Holczer András, Kasza Bence, Kormányos Hanna Rebeka, Kovács Péter Tamás, Molnár 157 Marcell, Öreg Botond, Repkényi Dorottya, Rózsa Tibor, Sal Kristóf, Szántó Benedek, Szász Norbert Csaba, Szépfalvi Bálint, Trócsányi Péter, Varju Ákos.
4 points:Bugár 123 Dávid, Gróf Tamás, Lőrincz Zoltán, Olosz Balázs, Páhoki Tamás, Radnai Bálint, Szentivánszki Soma , Tanner Martin, Varga-Umbrich Eszter.
3 points:2 students.
2 points:1 student.
1 point:4 students.
0 point:1 student.

Problems in Physics of KöMaL, March 2015