Question

Девочка площадь обеих подошв туфель = 200 см квадратных,оказывает на пол давление 20 кПа .Найти массу

Answer 1

Что то тут не так во-первых ЭТО ЧТО ЗА ЛАПА ТАКАЯ 200см? Масса получается вообще 4 тонны

Answer 2

Calculation of Mass

To find the mass of the girl, we need to use the formula:

Pressure = Force / Area

Given that the pressure exerted by the girl on the floor is 20 kPa and the total area of both shoe soles is 200 cm², we can calculate the force exerted by the girl on the floor.

Let's proceed with the calculation:

1. Convert the pressure from kilopascals (kPa) to pascals (Pa): - 1 kPa = 1000 Pa - 20 kPa = 20,000 Pa

2. Calculate the force exerted by the girl on the floor: - Force = Pressure * Area - Force = 20,000 Pa * 200 cm²

To proceed further, we need to convert the area from cm² to m²:

1 m² = 10,000 cm²

Therefore, 200 cm² = 0.02 m².

Substituting the values:

- Force = 20,000 Pa * 0.02 m²

Now, we can calculate the force:

- Force = 400 N

According to Newton's second law of motion, force (F) is equal to mass (m) multiplied by acceleration (a). In this case, the acceleration is due to gravity, which is approximately 9.8 m/s².

- Force = mass * acceleration

We can rearrange the formula to solve for mass:

- mass = Force / acceleration - mass = 400 N / 9.8 m/s²

Calculating the mass:

- mass ≈ 40.82 kg

Therefore, the mass of the girl is approximately 40.82 kg.