Zgled

Zgled
Opeka je težka 40 N. Enkrat leži na največji, enkrat pa na najmanjši ploskvi. Izračunajmo tlak za oba primera.

[latex]F=40 \operatorname{N}[/latex]
[latex]a=25,0\operatorname{cm}[/latex]
[latex]b=12,5\operatorname{cm}[/latex]
[latex]\rule{2.5cm}{0.4pt}[/latex]
[latex]p=?[/latex]

[latex]S_1 = a\cdot b[/latex]
[latex]S_1 = 25\operatorname{cm}\cdot12,5\operatorname{cm}[/latex]
[latex]S_1=312\operatorname{cm}^2[/latex]

 [latex]p_1=\frac{F}{S_1}_{}[/latex]

[latex]p_1=\frac{40\operatorname{N}}{0,0312\operatorname{cm^2}}[/latex]

[latex]p_1=1282 \operatorname{Pa}[/latex]

[latex]p_1\approx1300\operatorname{Pa}[/latex]

[latex]F=40 \operatorname{N}[/latex]
[latex]b=12,5\operatorname{cm}[/latex]
[latex]c=6,0\operatorname{cm}[/latex]
[latex]\rule{2.5cm}{0.4pt}[/latex]
[latex]p=?[/latex]

[latex]S_2 = b\cdot c[/latex]
[latex]S_2 = 12,5\operatorname{cm}\cdot6,0\operatorname{cm}[/latex]
[latex]S_2=75\operatorname{cm}^2[/latex]

 [latex]p_2=\frac{F}{S_2}_{}[/latex]

[latex]p_2=\frac{40\operatorname{N}}{0,0075\operatorname{cm^2}}[/latex]

[latex]p_2=5333 \operatorname{Pa}[/latex]

[latex]p_2 \approx 5300\operatorname{Pa}[/latex]