[tex]P= \frac{F}{S} [/tex]
In acest caz Forta este Greutatea.
[tex]P= \frac{G}{S} [/tex]
S reprezentand aria.
[tex]P= \frac{G}{A} [/tex]
[tex]G_{copil}= m_{copil}*g=28 kg * 9.81 \frac{N}{kg} =274.68 N[/tex]
[tex]G_{pisica}=m_{pisica}*g= 4kg* 9.81 \frac{N}{kg}=39.24N[/tex]
[tex]A_{cop}=160cm^2=16*10^{-3}m^2[/tex]
[tex]A_{pis}=18 cm^2=18*10^{-4}m^2[/tex]
[tex]P_{cop}= \frac{F_{cop}}{A_{cop}} = \frac{274.68N}{16*10^{-3}m^2} =17167.5 Pa[/tex]
[tex]P_{pis}= \frac{F_{pis}}{A_{pis}} = \frac{39.24N}{18*10^{-4}m^2}
=21800Pa[/tex]
[tex]17167.5 Pa\ \textless \ 21800Pa[/tex]
[tex]===\ \textgreater \ P_{cop}\ \textless \ P_{pis}[/tex]
