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Drevené teleso v tvare gule je ponorené polovicou svojho objemu. Hustota dreva má hodnotu 500kg/m3. Akú hustotu má kvapalina, v ktorej guľa pláve? (g=10,0 m/s2) .... správne má byt 1000kg/m3 ale…
Medzi dve kovové gule na dlhých závesoch, ktoré aa merateľných spôsobom priťahujú , bola vložená silná nepohybliva doska z olova, ako to ovplyvnilo polohu oboch kovových gúľ ? ... správna odpoved je…
Dievča o hmotnosti 60kg sa rozbehla a odskočila 4m ďaleko, pričom horizontálna zložka vektoru jej rýchlosti bola 8m/s2. Akú minimálnu prácu musela vynaložiť pri odraze, zanedbame odpor vzduchu a…
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