Pressure Standing on Nails
As you probably remember pressure is calculated from dividing force or weight in Newtons by the area in metres squared.
P= F(N) ÷ A(m2)
Follow the following steps carefully to calculate the pressure while standing on nails.
Finding The Weight:
 Weigh yourself on the Kilogram (Kg) scale and calculate your weight as follows.
F(N) = _____ kg*10N/Kg= _______ N.
 Place a sheet of paper on the nails and step on it. Make sure you get a complete clear footprint.
Finding the supporting Area:
 Count the number of nails supporting your weight. Gestimate where necessary.
 Calculate the area of one nail A(cm2) = πd2/4* where d=0.18cm
For 10cm finish nails the calculation goes as follows:
The circle of one nail end A(cm2) = 3.14 * 0.18cm x 0.18cm÷4 = 0.025 cm2
Then the area of all supporting nails = 0.025 cm2* _____ nails =_____ cm2
Calculate the pressure
P= F(N)÷ A(cm2)*10 000 cm2/m2
= _______ N ÷ __________ m2 x 10 000
= _________ N/ m2 or Pa
Then divide the Pascals by 1000 to convert to kilopascals.
Pressure = _________ kPa
 State as many ways as you can think of to reduce the pressure on your foot.