the invention u043fu043eu0437u0432u043eu043bu00a0u0435u0442 expand demonstration opportunities to study the principle of the independence of the range body, the nature of different primary speed and angles to the horizon. the essence of the u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0: u0443u0441u0442u0430u043du0430u0432u043bu0438u0432u0430u00a0 under the specified angle to the horizon u043du0430u043fu0440u0430u0432u043bu00a0u044eu0449u0443u044e 10 is placed at the two ends of the two ball bodies at all.by pressing on a pedal 8 affect the retainer 9, which releases the bar 2. as a result u043fu043eu0441u043bu0435u0434u043du00a0u00a0 under the action of the springs 4 u043fu043eu0432u043eu0440u0430u0447u0438u0432u0430u0435u0442u0441u00a0 and one of the ball body is in the horizontal u0441u043eu0441u0442u0430u0432u043bu00a0u044eu0449u0435u0439 and second falls straight down. 1 il.
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