Problem P. 4287. (November 2010)

P. 4287. An object, which decelerates uniformly along a circular path, looses two-thirds of its speed while it covers a half circle. From this stage, what fraction of the whole circular path does it cover until it stops, and how long does it take?

(4 pont)

Deadline expired on December 10, 2010.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A megállásig a körpálya 1/16-od részét teszi meg \(\displaystyle \frac{3}{8}T\) idő alatt, ahol \(\displaystyle T\) az eredeti sebességének megfelelő egyenletes körmozgás periódusideje.

Statistics:

197 students sent a solution.
4 points:	103 students.
3 points:	35 students.
2 points:	23 students.
1 point:	22 students.
0 point:	7 students.
Unfair, not evaluated:	7 solutionss.

Problems in Physics of KöMaL, November 2010