Mathematical and Physical Journal
for High Schools
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Problem P. 4185. (October 2009)

P. 4185. A bird can fly in the air at a constant speed v. There is a wind of speed v₁ blowing from the North. Into what direction should the bird fly in order to move in the East--West direction? What is its speed with respect to the Earth? Data: $v=40~\frac{\rm km}{\rm h}$ , $v_1=10~\frac{\rm m}{\rm s}$ .

(3 pont)

Deadline expired on November 10, 2009.

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

Megoldás. Az északi irányhoz képest 25,8 fokkal nyugatra repülő madár a Földhöz viszonyítva 17,4 $\displaystyle \frac{\rm km}{\rm h}$ sebességgel fog mozogni nyugat felé.

Statistics:

244 students sent a solution.

3 points: 155 students.

2 points: 56 students.

1 point: 7 students.

0 point: 17 students.

Unfair, not evaluated: 9 solutionss.

Problems in Physics of KöMaL, October 2009

244 students sent a solution.
3 points:	155 students.
2 points:	56 students.
1 point:	7 students.
0 point:	17 students.
Unfair, not evaluated:	9 solutionss.