Question

Задание Определите силу давления плиты если она оказывает давление на грунт 40 кПа, размеры основания плиты 80см x 120см СРОЧНООООО

Answer 1

Дано:

P = 40 кПа

Длина плиты = 120 см = 1,2 м

Ширина плиты = 80 см = 0,8 м

F - ?

Решение:

P = F/S

F = P*S

S = 0.8 * 1.2

F = 40 000 * 0.8 * 1.2 = 38 400 Н

Ответ: 38 400 Н или 38,4 кН

Answer 2

Calculating Pressure Exerted by a Plate on the Ground

To determine the pressure exerted by a plate on the ground, we can use the formula:

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

Where: - Force (F) is the force exerted by the plate on the ground. - Area (A) is the area of the plate in contact with the ground.

Given that the plate exerts a pressure of 40 kPa on the ground and the dimensions of the plate are 80 cm x 120 cm, we can calculate the force exerted by the plate and then determine the pressure.

Calculating the Force Exerted by the Plate

First, we need to convert the dimensions of the plate from centimeters to meters to ensure consistency in units.

Plate dimensions: - Length = 80 cm = 0.8 m - Width = 120 cm = 1.2 m

Now, we can calculate the area of the plate in square meters:

Area (A) = Length x Width Area (A) = 0.8 m x 1.2 m Area (A) = 0.96 m²

Determining the Force Exerted by the Plate

To find the force exerted by the plate, we rearrange the formula for pressure:

Force (F) = Pressure (P) x Area (A) Force (F) = 40 kPa x 0.96 m² Force (F) = 38.4 kN

Therefore, the force exerted by the plate on the ground is 38.4 kN.

Conclusion

The force exerted by the plate on the ground is 38.4 kN.