Question

Aria suprafetei de contact a unei caramizi cu podeaua este de 200 cm². Determina greutatea caramizii ,daca presiunea exercitata de aceasta este de 1 kPa

Answer 1

$200cm^2 \to 2 dm^2 \to \underline{ 0,02 m^2} \\\\ 1kPa \to \underline{1000Pa} \\\\\\ \boxed{P= \frac{F}{S}} \ \ \ \Longrightarrow \underline{\underline{F=P*S}} \\\\\\\ F \ \textless \ -\ \textgreater \ G \\\\\\ G=P*S= \\\\ G=1000\frac{N}{\not m^2}(Pa) \ \ * \ \ 0,02 \not m^2= \\\\ G= 1000*0,02N \\\\ \boxed{\boxed{G=20N}}$