Question

На полу лежит плита из бетона толщиной 24 см. Определи давление плиты на пол. Принять g=9,8Н/кг. Используй таблицу плотности веществ. ответ (округли до десятых): давление плиты на пол p≈ кПа.

Answer 1

Ответ:

дано:

h=24см=0,24м

g=9,8 H/kg

p=2700 kg/m3

Найти:

P-?

Решение:

P=Fтяж=mg

m=pV

V=hS

P=F/S

P=mg/S=pVg/S=p(h*S)g/S=gph

P=9,8H/kg*0,24м*2700kg/m3=6350,4Па=6кПа

Answer 2

Calculating Pressure Exerted by Concrete Slab on the Floor

To calculate the pressure exerted by the concrete slab on the floor, we can use the formula:

Pressure (p) = Force (F) / Area (A)

Where: - Force (F) = Weight of the concrete slab - Area (A) = Contact area between the slab and the floor

First, let's calculate the weight of the concrete slab.

The weight of the concrete slab can be calculated using the formula:

Weight (W) = Mass (m) × Acceleration due to gravity (g)

Given: - Thickness of the concrete slab (h) = 24 cm = 0.24 m - Acceleration due to gravity (g) = 9.8 N/kg

We also need the density of concrete to calculate the mass of the slab. Let's refer to the table of substance densities to find the density of concrete.

The density of concrete is approximately 2400 kg/m³.

Now, we can calculate the mass of the concrete slab using the formula:

Mass (m) = Density (ρ) × Volume (V)

Where: - Density of concrete (ρ) = 2400 kg/m³ - Volume (V) = Area (A) × Thickness (h)

Let's calculate the mass of the concrete slab and then proceed to find the pressure exerted by the slab on the floor.