Mathematical and Physical Journal
for High Schools
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Problem P. 4133. (January 2009)

P. 4133. What is the greatest angle of elevation of a slope onto which a cylinder which has an elliptical cross section can be placed, such that it stays at rest, provided that friction is big enough? The semi-major axis of the ellipse is a and its semi-minor axis is b.

(5 pont)

Deadline expired on February 11, 2009.


12 students sent a solution.
5 points:Deák Zsolt, Fonai Dániel, Földes Imre, Iván Dávid, Jéhn Zoltán, Laczkó Zoltán Balázs, Lovas Lia Izabella, Vuchetich Bálint.
4 points:Budai Ádám.
3 points:1 student.
2 points:2 students.

Problems in Physics of KöMaL, January 2009