Mathematical and Physical Journal
for High Schools
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Problem M. 331. (March 2013)

M. 331. Hang a tennis ball to the end of a thread and with this pendulum measure how much work is done by the air drag during one complete swing. How does this work depend on the initial displacement of the ball? Can we deduce from the measured data anything about which power of the velocity the air drag is proportional to (in case of smaller and bigger speeds)?

(6 pont)

Deadline expired on April 10, 2013.


21 students sent a solution.
6 points:Agócs Fruzsina, Holczer András, Horicsányi Attila, Juhász Péter, Kollarics Sándor, Szabó 928 Attila.
5 points:Bodor Gábor, Olar Alex, Olosz Balázs.
4 points:5 students.
3 points:4 students.
2 points:2 students.
1 point:1 student.

Problems in Physics of KöMaL, March 2013