Mathematical and Physical Journal
for High Schools
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# Problem P. 4638. (May 2014)

P. 4638. An object is projected up at an initial upward speed of 12 m/s on the Moon. What will the speed of the object be at the moment when the half of the time of the upward motion elapsed? And what will its speed be when it is halfway of its upward motion?

(3 pont)

Deadline expired on June 10, 2014.

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

Megoldásvázlat. Félidőben $\displaystyle v=v_0/2=6$ m/s, félúton $\displaystyle v=v_0/\sqrt{2}\approx 8{,}5$ m/s. (Az eredmények függetlenek a nehézségi gyorsulástól, tehát a Földön is ugyanekkorák lennének.)

### Statistics:

 78 students sent a solution. 3 points: 56 students. 2 points: 17 students. 1 point: 5 students.

Problems in Physics of KöMaL, May 2014