Mathematical and Physical Journal
for High Schools
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Problem P. 4126. (January 2009)

P. 4126. A cube of uniform density is slid from one end of the table to the other. What is the maximum of the coefficient of the kinetic friction if the performed work is less than the work done while the cube is slowly rolled along its edges from one end of the table to the other?

(4 pont)

Deadline expired on February 11, 2009.


142 students sent a solution.
4 points:118 students.
3 points:8 students.
2 points:6 students.
1 point:2 students.
0 point:5 students.
Unfair, not evaluated:3 solutions.

Problems in Physics of KöMaL, January 2009