Mathematical and Physical Journal
for High Schools
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Problem P. 4267. (September 2010)

P. 4267. The original length of a spring is 25 cm. It elongates 2 cm if a force of 1 N is exerted on it. A container is filled with water and one end of the spring is fixed 30 cm above the surface of the water in the container. A wooden block of mass 32 g and of density 0.4 g/cm3 is hanged onto the other end of the spring. The height of the block is 5 cm. To what depth does the block emerges into the water?

(4 pont)

Deadline expired on October 11, 2010.

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

Megoldás. Kb. 0,5 cm mélyen.


267 students sent a solution.
4 points:129 students.
3 points:84 students.
2 points:23 students.
1 point:17 students.
0 point:9 students.
Unfair, not evaluated:5 solutionss.

Problems in Physics of KöMaL, September 2010