KöMaL - Mathematical and Physical Journal for Secondary Schools
Hungarian version Information Contest Journal Articles News
Conditions
Entry form to the contest
Problems and solutions
Results of the competition
Problems of the previous years

 

 

Order KöMaL!

Competitions Portal

P. 4120. An easily moveable trolley of mass M and of length L is at rest on the horizontal tabletop. At the end of the trolley there is a frog of mass m. What must the initial speed of the frog be at which it has to leap in the direction of \alpha measured from the horizontal in order to land exactly at the other end of the trolley? (Data: M=0.6 kg, m=54 g, L=81 cm, \alpha=45o.)

(5 points)

Deadline expired on 12 January 2009.


Statistics on problem P. 4120.
163 students sent a solution.
5 points:110 students.
4 points:17 students.
3 points:13 students.
2 points:5 students.
1 point:3 students.
Unfair, not evaluated:15 solutions.


  • Problems in Physics of KöMaL, December 2008

  • Our web pages are supported by:   Ericsson   Google   Cognex   Emberi ErőforrĂĄs TĂĄmogatĂĄskezelő   Emberi ErőforrĂĄsok MinisztĂŠriuma  
    OktatĂĄskutatĂł ĂŠs Fejlesztő IntĂŠzet   Nemzeti TehetsĂŠg Program     Nemzeti
KulturĂĄlis Alap   ELTE   Morgan Stanley