Mathematical and Physical Journal
for High Schools
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Problem P. 4167. (May 2009)

P. 4167. A 1-kg object is placed to an inclined plane of variable slope angle. The object begins to slide down when the slope angle is \alpha=20o. If the slope angle is adjusted to \alpha=10o, what is the magnitude of the force F which makes the body slide, if force F lies in the plane of the incline and is perpendicular to the direction of the slope. In which direction does the object slide?

(5 pont)

Deadline expired on June 11, 2009.


93 students sent a solution.
5 points:53 students.
4 points:7 students.
3 points:5 students.
2 points:4 students.
1 point:17 students.
0 point:3 students.
Unfair, not evaluated:4 solutions.

Problems in Physics of KöMaL, May 2009