Recapitulare – [40]

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Contine intrebari- problema din lectiile: Lucrul mecanic, Puterea mecanica si Energia mecanica

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Examples of questions from "Recapitulare – [40]"

  • Din varful unui plan inclinat de inaltime 2m aluneca cu frecare un corp cu masa de 2kg. Lucrul mecanic efectuat de greutatea corpului pana in momentul opririi in lungul planului orizontal:
  • O macara ridica vertical un corp cu masa de 50 kg, cu viteza constanta de 1m/s. Puterea dezvoltata de macara este:
  • Un om deplaseza cu viteza constanta pe o suprafata orizontala o lada cu masa de 100kg. Coeficientul de frecare dintre lada si suprafata pe care se deplaseaza este 0,5 si deplasarea de 800 cm. Lucrul mecanic efectuat de forta de frecare:

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