# Problem P. 3954. (February 2007)

**P. 3954.** Cars of length *l* travel with uniform velocity of *v* and pass a road sign. The distance between them is *x*. The greater their speed the greater the distance between them. The relationship between their speed and the distance between them is given by the function *x*=*v*^{2}, where is constant, characteristic to all cars. What is the velocity at which the most cars go past the road sign during a given time?

(4 pont)

**Deadline expired on March 12, 2007.**

### Statistics:

135 students sent a solution. 4 points: 99 students. 3 points: 11 students. 2 points: 8 students. 1 point: 6 students. 0 point: 5 students. Unfair, not evaluated: 6 solutionss.

Problems in Physics of KöMaL, February 2007