Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem M. 379. (September 2018)

M. 379. Measure the height from which a retractable ballpoint click pen should be dropped from a vertical position in order that it is clicked on. When the tip of the pen is already out, from what height should it be dropped vertically in order that it is clicked off?

(6 pont)

Deadline expired on October 10, 2018.

### Statistics:

 32 students sent a solution. 6 points: Bányai Kristóf, Csépányi István, Horváth 999 Anikó, Kondákor Márk, Kozák 023 Áron, Morvai Orsolya, Pácsonyi Péter, Tóth Ábel, Várkonyi Zsombor. 5 points: Fülöp Sámuel Sihombing, Merkl Gergely, Olosz Adél, Sárvári Borka Luca, Varga 235 Áron. 4 points: 3 students. 3 points: 3 students. 2 points: 5 students. 1 point: 4 students. 0 point: 1 student. Not shown because of missing birth date or parental permission: 2 solutions.

Problems in Physics of KöMaL, September 2018