A 50 kg. girl wearing high heel shoes balance on a single heel. The heel is circular with a diameter 1 cm. what is the pressure exerted by the heel on the horizontal floor?

Explanation

Mass of girl `m=50kg`
`therefore` force on the heel, `F=mg=50xx9.8=490N`
Diameter, `D=1.0cm=1xx10^(-2)m`
`therefore` Area, `A=(piD^(2))/(4)=(3.14xx(1xx10^(-2))^(2))/(4)=7.85xx10^(-5)m^(2)`
`therefore` Pressure, `P=(F)/(A)=(490)/(7.85xx10^(-5))=6.24xx10^6Pa`.