Question

the mass of a boy is 20 kg and the area of the sole of his foot is 0.01 m.if g=10 m/s,calculate the pressure exerted on the floor when he is standing on ,Both feet and one feet

Answer 1

$$\begin{gathered} Weknowpresure=\frac{force}{area} \\ nowforce=mg=20\times 10N=200N \\ areaoftwofeet=2\times 0.01m^2=0.02m^2 \\ pressure=\frac{200}{0.02}=10000Pa \\ \left(b\right)foronefeetare=0.01m^2 \\ sopressure=\frac{200}{0.01}=20000Pa\left[ANS\right\} \end{gathered}$$