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Ce cerceteaza Cinematica? Formele miscarii corpurilor si caracteristicile acesteia, fara a evidentia insa factorii ce determinia o forma sau alta de miscare.
Ce este numit punct material? Corpul ale carui dimensiuni spatiale pot fi neglijate in comparatie cu distanta parcursa sau cu distantele pana la alte corpuri.
Ce este un corp rigid? Corpul la care distanta dintre orice doua puncte ramane invariabila in timp.
Ce este miscarea mecanica? Schimbarea unui corp in timp a pozitiei sale fata de alte corpuri.
Ce permite Traiectoria? Vizualizarea simultana a tabloului integral al miscarii, al tuturor punctelor prin care a trecut sau va trece mobilul in timpul miscarii.
Definitia de miscare rectilie uniforma. Miscarea rectilinie a punctului material care parcurge deplasari egale in intervale de timp egale.
Ecuatia cinematica a miscarii rectilinii uniforme. x=x_0-ϑ×t
Cu ce este direct proportionala deplasarea mobilului ce se misca rectiliniu uniform? Durata miscarii.
Ce este acceleratia? Marimea fizica ce caracterizeaza rapiditatea variatei vitezei mobilului.
Formula acceleratiei. a=ϑ/t
Ce este acceleratia centripeta? Miscarea circulara unforma a mobilului.
Created by: 753641491686152
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