Modelová Otázka ID 2690 - 
Jaká je rychlost bodu obíhajícího kružnici o poloměru 1 m, jestliže vykoná 180 otáček za minutu?
Správná odpověď je: C
180 oběhů kružnice za minutu odpovídá 3 oběhům za sekundu. Protože pro obvod kružnice o platí 
, oběhová rychlost bodu je rovna:
v = s/t = (3 · o)/t = (3 · 2 · π · 1 m)/1 s = 6 · π m · s−1.
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