Question

Вес шкафа равен 11 кН. У шкафа четыре ножки. Площадь опоры каждой ножки равна 100 см². Какое давление оказывает шкаф на соответствующую поверхность?? ( При необходимости ответ округли до целого числа ) давление ровно : .... кПа

Answer 1

Ответ: 275кПа

Объяснение:

Дано:

Р=11кН=11000Н

S1=100cм²=0,01м²

n=4

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р-?

р=Р/S=P/4S1=11000/(4*0,01)=275000Па=275кПа

Answer 2

Calculation of Pressure

To calculate the pressure exerted by the cabinet on the corresponding surface, we need to divide the force exerted by the cabinet by the area of the surface.

Given: - Weight of the cabinet = 11 kN - Number of legs on the cabinet = 4 - Area of each leg = 100 cm²

To find the pressure, we can use the formula:

Pressure = Force / Area

Let's calculate the pressure:

1. Convert the weight of the cabinet from kilonewtons (kN) to newtons (N): - 1 kN = 1000 N - Weight of the cabinet = 11 kN * 1000 N/kN = 11000 N

2. Calculate the total area of the legs: - Total area = Number of legs * Area of each leg - Total area = 4 * 100 cm² = 400 cm²

3. Convert the total area from square centimeters (cm²) to square meters (m²): - 1 cm² = 0.0001 m² - Total area = 400 cm² * 0.0001 m²/cm² = 0.04 m²

4. Calculate the pressure: - Pressure = Weight of the cabinet / Total area - Pressure = 11000 N / 0.04 m² = 275000 N/m²

Therefore, the pressure exerted by the cabinet on the corresponding surface is 275000 N/m².

Note: The answer has been rounded to the nearest whole number, which is 275000 Pa (pascals) or 275 kPa (kilopascals).