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Eliška tlačila kreslo priamočiaro z jednej izby do kuchyne stálou silou 60N. Vykonala pri tom prácu 300J. Ako ďaleko Eliška odtlačila kreslo?
Pani knihovníčka ukladala 50 kníh, každú s hmotnosťou 250g na políčku, ktorá bola vo výške 1,8 metra nad zemou. Akú prácu vykonala?
Akú prácu vykonal žeriav, ak zdvihol betónový panel s hmotnosťou 150kg z výšky h0= 1m do výšky h1= 5,5m?
Medzi Liborom a Barborou sa strhla malá diskusia na tému konania mechanickej práce. Predstav si, že máš činku s hmotnosťou 10kg. Kedy vykonáš väčšiu prácu? Keď ju držíš nad hlavou 4 minúty, alebo ak…
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