Question

va rog,daca puteti sa ma ajutati.ms

ecd3d2cc77dba943fb8cbff21884cb53.pdf

Answer 1

In cazul 1, forta de frecare trebuie sa fie compensata de forta elastica:

$F_f=F_e\\ \mu_1 N=k\Delta l_1\ \ \ \ \ \Rightarrow \ \ \ \ \ \dfrac{k}{N}=\dfrac{\mu_1}{\Delta l_1}.$

In al doilea caz, e la fel:

$\mu_2N=k\Delta l_2\ \ \ \ \ \Rightarrow \ \ \ \ \mu_2=\dfrac{k}{N}\Delta l_2=\dfrac{\mu_1}{\Delta l_1}\Delta l_2=...calcule$

Spor la calculat