Calculate the pressure exerted on the floor by a boy whose weight is 45 kg, and the area of the soles of his shoes is 300 cm2.

m = 45 kg.

g = 10 m / s2.

S = 300 cm2 = 0.03 m2.

R – ?

Pressure P is a scalar physical quantity that shows what force F is applied per unit area S: P = F / S.

The boy acts on the floor by the force of his weight, the value of which is expressed by the formula: F = m * g, where m is the body mass, g is the acceleration of gravity.

The boy’s pressure P is determined by the formula: P = m * g / S.

P = 45 kg * 10 m / s2 / 0.03 m2 = 15000 Pa.

Answer: the boy’s pressure on the floor is P = 15000 Pa.