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P. 4030. A house, situated 100 m to the South of a straight road running East--West, contains a television set which is receiving signals from a distant transmitter, also situated South of the road, operating at a frequency of 60 MHz. A bus, travelling along the road in a westerly direction, causes the received signal to fluctuate in intensity, the rate of fluctuation is 2 Hz when the bus is opposite the house and (temporarily) reduces to zero when it is 200 m further along the road. Find the speed of the bus and the direction of the transmitter.

(5 points)

Deadline expired on 11 January 2008.


Statistics on problem P. 4030.
12 students sent a solution.
5 points:Filep Tibor, Fonyó Dávid, Földes Tamás, Lovas Lia Izabella, Pázmán Koppány, Szűcs Gergely.
4 points:Almási 270 Gábor András, Csányi Gergely, Szolnoki Lénárd.
2 points:1 student.
1 point:2 students.


  • Problems in Physics of KöMaL, December 2007

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