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P. 4225. Two balls are started at the same time, one of them starts from rest at the top of the inclined plane, the angle of inclination is , and the other is projected from point O, and they reach point P at the same time. At what angle does the second ball have to be projected?

(4 points)

Deadline expired on 10 March 2010.

Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldás. A vízszinteshez képest $\displaystyle \beta$ szöggel, melyre $\displaystyle \tg\beta=\frac{2}{\sin2\alpha}$.

Statistics on problem P. 4225.
 134 students sent a solution. 4 points: 107 students. 3 points: 17 students. 2 points: 7 students. 1 point: 1 student. 0 point: 1 student. Unfair, not evaluated: 1 solution.

• Problems in Physics of KöMaL, February 2010

•  Támogatóink: Morgan Stanley