Mathematical and Physical Journal
for High Schools
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Problem P. 4095. (October 2008)

P. 4095. The traffic in some part of a three-lane motorway is restricted to only one lane. In this part the cars move uniformly at a speed of 54 km/h and 11-m long gaps are formed between them.

a) What is the speed of the cars before the one-lane part, if the gap between them is 2 m?

b) What will the length of the gaps between the cars be after the one-lane part if the cars speed up to a velocity of 126 km/h?

Let us consider the length of each car 4 m.

(4 pont)

Deadline expired on November 11, 2008.


171 students sent a solution.
4 points:85 students.
3 points:7 students.
2 points:21 students.
1 point:32 students.
0 point:26 students.

Problems in Physics of KöMaL, October 2008