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## QuestionPhysicsClass 11

How much pressure will a girl of 50 kg wearing heels with an area of cross section $$1 cm^2$$ exert on the ground?
(A) $$150\times 10^4 Pa$$
(B) $$250\times 10^4 Pa$$
(C) $$350\times 10^4 Pa$$
(D) $$450\times 10^4 Pa$$

Total Area of cross section of two heels = 2 $$cm^{2}$$ = $$2\times 10^{-4}$$ $$m^{2}$$
as Pressure = $$\dfrac{Force}{Area}$$ = mg/A = $$\dfrac {500}{ 2\times 10^{-4} }$$ = $$250\times 10^{4}$$ Pa
so option (B) is correct .