Mathematical and Physical Journal
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# Problem P. 4761. (October 2015)

P. 4761. The acceleration of a strange car is inversely proportional to its speed in the speed interval of $\displaystyle (v_1,v_2)$, so $\displaystyle a=A/v$ ($\displaystyle A$ is a positive constant).

$\displaystyle a)$ How long does it take for the car to speed up from the speed $\displaystyle v_1$ to the speed $\displaystyle v_2$?

$\displaystyle b)$ What is the power of the car during this motion?

(4 pont)

Deadline expired on November 10, 2015.

### Statistics:

 80 students sent a solution. 4 points: Asztalos Bogdán, Balogh Menyhért, Blum Balázs, Bukor Benedek, Büki Máté, Csenger Géza, Csuha Boglárka, Debreczeni Tibor, Di Giovanni András, Édes Lili, Elek Péter, Farkas Domonkos, Forrai Botond, Gergely 444 Kornél, Ghada Alshalan, Iván Balázs, Jakus Balázs István, Kádár 012 István, Kovács Péter Tamás, Körmöczi Dávid, Krasznai Anna, Mándoki László, Mány Bence, Márkus Tamás, Molnár Mátyás, Nemes Bálint, Németh Flóra Boróka, Olosz Adél, Osváth Botond, Páhoki Tamás, Pataki 245 Attila, Pszota Máté, Radnai Bálint, Sal Kristóf, Szalai Istvan, Szántó Benedek, Szemerédi Levente, Szentivánszki Soma , Szépfalvi Bálint, Takács Attila, Tófalusi Ádám, Tomcsányi Gergely, Tompa Tamás Lajos, Veres Tamás, Weisz Pál, Zöllner András. 3 points: 12 students. 2 points: 8 students. 1 point: 4 students. 0 point: 8 students. Unfair, not evaluated: 2 solutionss.

Problems in Physics of KöMaL, October 2015