Question

a drawing pin is pushed against a wooden board with a force of 25 Newton. calculate the pressure exerted at the tip of pin. ( take, area of the tip,=0.1mm square)

Answer 1

pressure = force/area 
               =25N/0.1×10^-6 m
               =25 * 10^6 /0.1
               =2.5 * 10^8 pa