Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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# Problem M. 369. (May 2017)

M. 369. Measure the rotational inertia of a AA battery (Mignon) about its axis of symmetry ($\displaystyle a$), and about the axis ($\displaystyle b$) which is perpendicular to the previous one and goes through the centre of mass of the battery.

Give the result in terms of $\displaystyle mR^2$ and $\displaystyle mH^2$. ($\displaystyle R$ is the radius of the battery, $\displaystyle H$ is its height and $\displaystyle m$ is its mass.)

(6 pont)

Deadline expired on June 12, 2017.

### Statistics:

 10 students sent a solution. 6 points: Fekete Balázs Attila, Kovács Péter Tamás, Kozák 023 Áron, Olosz Adél. 5 points: Fehér 169 Szilveszter, Krasznai Anna, Morvai Orsolya, Nagy 555 Botond. 4 points: 1 student. 0 point: 1 student.

Problems in Physics of KöMaL, May 2017