Recapitulare - [40] - KIDIBOT Knowledge Battles

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:
  • Un mar cu masa 200 g cade de pe ramura unui pom. Imediat inaintea contactului cu solul, produsul dintre masa marului si viteza acestuia este de 2kg m/s. In acelasi moment, energia cinetica a marului este:
  • O macara ridica vertical un corp cu masa de 50 kg, cu viteza constanta de 1m/s. Puterea dezvoltata de macara este:

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