KöMaL - Középiskolai Matematikai és Fizikai Lapok
Sign In
Sign Up


Problem P. 4288. (November 2010)

P. 4288. A spring of length \ell, is hang and when an object is attached to it, its length changes to 2\ell. (The extension of the spring is proportional to the force and its mass is negligible.) When the object, attached to the spring, undergoes uniform circular motion along a horizontal path, the length of the spring is L What are the radius of the circle and the angular speed of the object?

(4 pont)

Deadline expired on 10 December 2010.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A szögsebesség \(\displaystyle \sqrt{\left(\frac{1}{\ell}-\frac{1}{L}\right)g}\), a körpálya sugara pedig \(\displaystyle \frac{L}{L-\ell}\sqrt{L(L-2\ell)}.\)


131 students sent a solution.
4 points:55 students.
3 points:13 students.
2 points:25 students.
1 point:18 students.
0 point:15 students.
Unfair, not evaluated:5 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