Question

De la ce inaltime cade un corp daca la suprafata pamintului viteza lui este egala cu 10 m/s? dau 20 de puncete urgentttttttttttt!

Answer 1

Stim ca:
v=√2gh    |*2
=>v²=2gh=>h=v² supra 2g
h=100m²/s² supra  2*10N/kg=5 m
Deci, corpul cade de la 5 m

Answer 2

$E_p=E_c \\ v=10 \ m/s \\ g=10 \ N/kg \\ m_1=m_2=m \\ \boxed{h-?} \\ \bold{Rezolvare:} \\ \boxed{E_p=m \cdot g \cdot h} \ \ \ \ \ \ \ \ \ \ \ \ \ \boxed{E_c=\frac{m \cdot v^2}{2}} \\ E_p=E_c=m \cdot g \cdot h= \frac{m \cdot v^2}{2} \\ \Rightarrow g \cdot h= \frac{v^2}{2} \\ 10 \ N/kg \cdot h= \frac{(10 \ m/s)^2}{2} = \frac{100}{2} \\ 10 \ N/kg \cdot h=50 \\ h= \frac{50}{10 \ N/kg} \\ \Rightarrow \boxed{h=5 \ m}$