A girl is wearing a pair of flat shoes. She weighs 550 N. The area of contact of one shoe with the ground is 160 cm². What pressure will be exerted by the girl on the ground if she stands on two feet?

Here given, Area of one shoe $=160\ cm^2=160\times10^{-4}\ m^2$

Therefore, total area of pair of shoes $=2\times160\times10^{-4}\ m^2=320\times10^{-4}\ m^2$

Force exerted on the ground $=$wieght of the girl$=550\ N$

Therefore, pressure on the ground by two feet$=\frac{Force\ exerted}{Area}$

$=\frac{550\ N}{320\times10^{-4}\ m^2}$

$=17187.5\ N/m^2$

Therefore,  pressure $17187.5\ N/m^2$ is exerted by the girl on the ground if she stands on two feet

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Updated on: 10-Oct-2022

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