Problem P. 3977. (April 2007)

P. 3977. tional acceleration if the radius of the sphere is 10 km, and the centre of the sphere is 11 km below the surface of the Earth. Calculate the change in the gravitational acceleration exactly above the oil field and 20 km away from this point.

(5 pont)

Deadline expired on May 11, 2007.

Statistics:

48 students sent a solution.
5 points:	Almási 270 Gábor András, Almasi Susann Melinda, Blázsik Zoltán, Hlatky Dávid, Lovas Lia Izabella, Roósz Gergő, Szolnoki Lénárd, Tüzes Dániel.
4 points:	Balogh Máté, Drozdy András, Dudás János, Fonyó Dávid, Földes Imre, Hartstein Máté, Hegyi Ádám, Hujter Bálint, Kupcsik Réka, Nagy 224 Csaba, Para Attila, Tolner Ferenc, Tóth 123 László.
3 points:	13 students.
2 points:	3 students.
1 point:	7 students.
0 point:	2 students.
Unfair, not evaluated:	2 solutionss.

Problems in Physics of KöMaL, April 2007