Mathematical and Physical Journal
for High Schools
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Problem P. 4235. (March 2010)

P. 4235. The distance between the cars in a long queue of cars is 15 m and the average length of a car is 5 m. The speed of the car-queue is 72 km/h. How long does it take after an accident to develop a 10 km-long car-queue consisting of standing cars if the distance of the cars is 3 m?

(4 pont)

Deadline expired on April 12, 2010.

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

Megoldás. Körülbelül 12,5 perc alatt kialakul a 10 km-es kocsisor.


127 students sent a solution.
4 points:89 students.
3 points:7 students.
2 points:12 students.
1 point:15 students.
0 point:1 student.
Unfair, not evaluated:3 solutionss.

Problems in Physics of KöMaL, March 2010