Mathematical and Physical Journal
for High Schools
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Problem P. 3846. (December 2005)

P. 3846. A hollow solid of revolution is rotated about its vertical axis of symmetry at an angular velocity of \omega. What is the shape of this solid if a small object is in equilibrium at any point on the interior surface of the solid. (Static friction is negligible.)

(4 pont)

Deadline expired on January 11, 2006.


Statistics:

113 students sent a solution.
4 points:58 students.
3 points:11 students.
2 points:9 students.
1 point:12 students.
0 point:21 students.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, December 2005