Trampolines • with a full load of internal fuel a F-16 fighter plane can withstand up to nine Gs (nine times the force of gravity) when making a sharp turn? • the modern trampoline was invented around 1934 by door George Nissen and Larry Griswold as a piece of exercise equipment for springboard divers? ”the Ko Brothers” have made a song about trampoline jumping and that Etan sponsored it? • trampoline jumpers can reach great heights? • the sports hall in which trampoline jumpers train has to be at least 8 metres high? • the sports hall in which trampoline jumpers train will have to be at least 8 metres high? in the beginning of the 20th century acts were performed in which the so-called "bouncing beds" were used to entertain the audience? • the bouncing bed actually was a small trampoline covered with bedclothes on which the acrobats performed, usually funny, tricks. • the first form of trampoline jumping was practised by the Eskimos? They used whale skin to toss each other up into the air. • the circus is the cradle of the sport of trampoline jumping? • trampoline jumping has been an Olympic sport since the year 2000? • in 2001 Martin Kraft, who was an active jumper of the trampoline association of the University of Karlsruhe during his study, made a mathematic model of the trampoline? With the use of that model it was calculated that a child of 40 kg has to endure 9 times the force of gravity when doing a 2-metre jump.
Basketball • basketball was originally invented by the Incas who played the game in a stone field with a stone ring which was suspended vertically? • the net hangs at 3.048 metres? • that they used to play with champagne corks or balls of wool? • the bats used to be made of, for instance, cork, parchment, wood and velvet?
Poolbilliard • (pool)billiards initially used to be played as a field sport? • the billiard cue was developed at the end of the 17th century? • when cueing off a temperature can be reached of 250 degrees underneath the ball? • the Frenchman Lucien Rosengart is the inventor of the first soccer table? He lived from 1880 to 1976.
Table soccer • the sport of table soccer has only developed after the 2nd world war? • (during the second World War the trampoline was used to train pilots?) • (American soldiers still get trampoline training as part of their education in the army?)