Question

Calculati viteza stiind ca h=20 m si g=10N/kg

Answer 1

Se da:
h=20m
g=10N/kg
v=?m/s

Formule:
[tex]Ep=Ec\\ m*g*h= \frac{m*v^{2}}{2} \\ g*h= \frac{ v^{2} }{2}\\ 2*g*h=v^{2}\\ v= \sqrt{2*g*h} \\ Calcule:\\ v= \sqrt{2*20*10} =20 \frac{m}{s} [/tex]