Question

me ajude e de fisica pfv pra amanha​

Answer 1

$\mathbf{Dados}\Longrightarrow h=180\ \text{m};\ g\approx10\ \mathrm{m/s}.$

$\mathbf{a)\ Tempo\ gasto\ para\ atingir\ o\ solo}\text{:}$

$0=h-\dfrac{1}{2}gt^2\Longrightarrow\boxed{t=\sqrt{\dfrac{2h}{g}}}$

$\Longrightarrow t\approx\sqrt{\dfrac{2(180)}{10}}\approx\sqrt{36}\ \therefore\ \boxed{t\approx 6\ \text{s}}$

$\mathbf{b)\ Velocidade\ ao\ atingir\ o\ solo}\text{:}$

$v^2=0^2+2g(h-0)\Longrightarrow \boxed{v=\sqrt{2gh}}$

$\Longrightarrow v\approx\sqrt{2(10)(180)}\approx\sqrt{3600}\ \therefore\ \boxed{v\approx60\ \mathrm{m/s}}$