Question

Какое давление на фундамент оказывает кирпичная стена обьемом 2³ , если площадь ее опоры 0,4² ?

Answer 1

P = F/S
F = m*g
m = p*V
p - плотность кирпича
V - объем стены
m - масса стены
P - давление

P = p*V*g /S

Answer 2

Calculation of Pressure on a Brick Wall

To calculate the pressure exerted on a brick wall, we need to know the volume of the wall and the area of its support. Let's use the given values to calculate the pressure.

Given: - Volume of the brick wall: 2³ (cubic units) - Area of the support: 0.4² (square units)

To calculate the pressure, we can use the formula:

Pressure = Force / Area

In this case, the force is the weight of the brick wall, and the area is the area of its support.

Calculation Steps:

1. Calculate the weight of the brick wall: - The weight of an object can be calculated using the formula: Weight = Mass x Gravity - Since we don't have the mass of the brick wall, we can assume a density for the brick and calculate the mass. - Let's assume the density of the brick wall is 2000 kg/m³ (a typical value for bricks). - The volume of the brick wall is given as 2³, which means the volume is 2 x 2 x 2 = 8 cubic units. - To convert the volume to cubic meters, we need to multiply by a conversion factor. Let's assume 1 cubic unit is equal to 0.001 cubic meters. - Therefore, the volume in cubic meters is 8 x 0.001 = 0.008 cubic meters. - Now we can calculate the mass of the brick wall using the formula: Mass = Density x Volume - Mass = 2000 kg/m³ x 0.008 m³ = 16 kg - The weight of the brick wall is equal to the mass multiplied by the acceleration due to gravity (9.8 m/s²). - Weight = 16 kg x 9.8 m/s² = 156.8 N (Newtons)

2. Calculate the pressure: - The area of the support is given as 0.4², which means the area is 0.4 x 0.4 = 0.16 square units. - Pressure = Weight / Area - Pressure = 156.8 N / 0.16 square units = 980 N/square unit

Answer:

The pressure exerted on the brick wall with a volume of 2³ and a support area of 0.4² is 980 N/square unit.