m = 47 kilograms – the mass of a person;
g = 9.8 meters per second squared – gravitational acceleration;
S = 400 square centimeters – the area of a person’s soles.
It is required to determine P (Pascal) – the pressure that a person exerts on the floor.
We convert the units of measurement of area from square centimeters to square meters:
S = 400 cm2 = 400 * 10-4 = 0.04 square meters.
Let’s find the force of gravity acting on a person:
F = m * g = 47 * 9.8 = 460.6 Newton.
Then the pressure will be equal to:
P = F / S = 460.6 / 0.04 = 11515 Pascal = 11.5 kPa.
Answer: the pressure is 11.5 kPa.
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