Modelová Otázka ID 3181 - 
Jaká bude přibližná výsledná vzdálenost bodu od jeho původní polohy, jestliže tento bod vykoná přímočarý pohyb do vzdálenosti 10 metrů a následně se pohybuje opět přímočaře po trase dlouhé 10 metrů, ovšem ve směru kolmém k původnímu směr pohybu?
Správná odpověď je: B
Trajektorie pohybu bodu spolu se spojnicí počátku a konce pohybu bodu tvoří pravoúhlý trojúhelník, kdy přeponou je výsledná vzdálenost. Tu lze zjistit s pomocí Pythagorovy věty: 
. V tomto případě se a a b rovnají, tedy c2 = 2 · a2. Po úpravě na 
lze výpočtem určit vzdálenost výchozího a konečného bodu na přibližně 14 metrů.
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