Mathematical and Physical Journal
for High Schools
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Problem P. 4146. (March 2009)

P. 4146. One end of a compressed spring is attached to a wall, and the other is attached to an object which can slide along a rough horizontal surface. The initial compression of the spring is 24 cm, and the system is left alone in this position. When the spring is in the unstretched position the mechanical energy of the system is half of the original energy. How far can the object move from the initial position?

(4 pont)

Deadline expired on April 14, 2009.


114 students sent a solution.
4 points:69 students.
3 points:26 students.
2 points:16 students.
1 point:1 student.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, March 2009