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Matematica clasa a lX-a

 
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*DeaGle*
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Post Posted: 14-10-2010, 15:35:17 | Translate post to: ... (Click for more languages)

Un corp de masã m = 10kg pleacã din repaus de la înãlþimea h = 8m, pe un plan înclinat de unghi α = 300 ( µ = 0,2) Se cere:
a) acceleraþia corpului la coborârea corpului pe planul înclinat;
b) energia cineticã la baza planului înclinat;
c) durata miºcãrii corpului în plan orizontal, de la baza planului înclinat pânã la oprire, pe planul orizontal µ = 0,2.

ceva ajutor daca se poate




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In2ition

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Post Posted: 14-10-2010, 16:18:34 | Translate post to: ... (Click for more languages)

Pe langa formulele de la energii si forte de frecare, la ce lectie din mecanica esti? Nu mai tin minte materia de a 9-a, si nici caietele vechi nu le mai am.
Si vezi ca asta e fizica, nu matematica.


We stop looking for monsters under the bed when we realize they're inside of us.

nr913 wrote:
no really, dacã nu era așa țãrancã, și dacã era în bucurești, o luam de nevastã

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