# A concrete slab 2 m long and 1.5 m wide exerts a pressure of 3 kPa on the ground. Determine the slab mass.

L = 2 m.

a = 1.5 m.

P = 3 kPa = 3000 Pa.

g = 9.8 m / s2.

m -?

P = F / S – the formula for determining the pressure of the plate on the soil.

F = m * g is the weight of the concrete slab.

The slab has the shape of a rectangular parallelepiped, so the area S, on which the weight of the concrete slab acts, has the shape of a rectangle.

S = L * a.

The formula for determining the pressure of the plate will be: P = m * g / L * a.

We express the mass of the concrete slab by the formula: m = P * L * a / g.

m = 3000 Pa * 2 m * 1.5 m / 9.8 m / s2 = 918 kg.

Answer: a concrete slab has a mass of m = 918 kg. One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.