Question

A body of mass 20kghas a surface area of 20cm x 50cm.What is the pressure exerted by a body on its surface in SI unit? (g=10m/s2)

Answer 1

$$\begin{gathered} Area=20\times 50c{m}^2=1000c{m}^2=0.1m^2 \\ mass=m=20kg \\ force=mg \\ pressure=force/area \\ pressure=20\times 10/0.1=2000Pa \end{gathered}$$