KöMaL - Középiskolai Matematikai és Fizikai Lapok
Sign In
Sign Up


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 14 April 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.

Our web pages are supported by:   Ericsson   Cognex   Emberi Erőforrás Támogatáskezelő   Emberi Erőforrások Minisztériuma   Nemzeti Tehetség Program    
MTA Energiatudományi Kutatóközpont   MTA Wigner Fizikai Kutatóközpont     Nemzeti
Kulturális Alap   ELTE   Morgan Stanley