Tentang Olimpiade Fisika (Pdf) - Yohanes Surya.com

Soal OFI 1:1. A ball of mass M = 0,2 kg rests on a vertical column, height h = 5 m. Abullet, mass m = 0,01 kg, traveling at v 0 = 500 m/s, passes horizontallythrough the center of the ball. The ball reaches the ground at a distance ofs = 20 m. Where does the bullet reach ground? What part of the kineticenergy of the bullet was transferred as heat to the bullet?Soal OFI XI1. A space ship of mass m = 12 ton is revolving on a circular orbit about themoon in height h = 100m. In order to reach the surface of the moon its jetengine is switched on at point X for a short time. The velocity of the hot gasesissueing from the nozzles u = 10.000 m/s relative to the space ship. The radiusof the moon R = 1700 km, the acceleration of free fall on its surface g = 1,7m/s 2 . The space ship can reach the moon by two different methods (seefigure): a) arriving on the moon in point A, opposite to point X; b) touchingthe moon surface tangentially at point B after having given a momentumdirected toward the center of the moon at point X. Calculate the quantity offuel necessay in each case.BAXAX13