What pressure is exerted on the floor by a boy, whose mass is 48 kg, and the area of the soles of his shoes is 320 cm2.

The pressure that the boy produces (the boy’s weight) on the floor can be calculated using the formula:

P = F / S, where F is the value of the acting force (F = Ft (gravity) = P (boy’s weight) = m * g, where m is the boy’s weight (m = 48 kg), g is the acceleration of gravity (let’s take g = 10 m / s2)), S is the total area of the soles of the boy’s shoes (S = 320 cm2 = 320 * 10-4 cm2).

Let’s calculate the pressure:

P = m * g / S = 48 * 10 / (320 * 10-4) = 15000 Pa = 15 kPa.

Answer: The boy produces a pressure of 15 kPa on the floor.