Mathematical and Physical Journal
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Problem P. 4004. (October 2007)

P. 4004. The kinetic energy of a cart of mass 4 kg, moving on a straight horizontal track is 50 J. It collides with another cart of mass 6 kg, which was at rest, and they are coupled.

By what amount does the kinetic energy of the system of the two carts decreased?

(3 pont)

Deadline expired on November 12, 2007.


369 students sent a solution.
3 points:316 students.
2 points:19 students.
1 point:7 students.
0 point:24 students.
Unfair, not evaluated:3 solutions.

Problems in Physics of KöMaL, October 2007