Question

Девочка массой 41 кг стоит на лыжах. Длина каждой лыжи равна 1,2 м, ширина равна 10 см. Какое давление оказывает девочка на снег? Принять g≈10Н/кг. Ответ (округли до целого числа): девочка оказывает на снег давление p= Па.

Answer 1

Ответ:

Дано:

m=41кг

а=1,2м

b=10см

g=10Н/кг

Найти:

p

Формулы:

Fтяж=gm

S=ab

p=Fтяж/S

Решение:

1,2м=120см

1) Fтяж=10Н/кг*41кг=410Н

2)S=120см*10см=1200см²=0,12м²

3)p=410Н/0,12м²=3,4Па

Ответ:3,4Па

Answer 2

#### Calculation of Pressure To calculate the pressure exerted by the girl on the snow, we can use the formula: **Pressure (p) = Force (F) / Area (A)** The force exerted by the girl is equal to her weight, which can be calculated using the formula: **Weight (W) = Mass (m) x Gravity (g)** Given that the mass of the girl is 41 kg and the acceleration due to gravity is approximately 10 N/kg, we can calculate her weight: **Weight (W) = 41 kg x 10 N/kg = 410 N** Now, let's calculate the area of contact between the girl and the snow. The area can be approximated as the product of the length and width of each ski: **Area (A) = Length (L) x Width (W)** Given that the length of each ski is 1.2 m and the width is 10 cm (or 0.1 m), we can calculate the area: **Area (A) = 1.2 m x 0.1 m = 0.12 m²** Now, we can substitute the values into the pressure formula to find the pressure exerted by the girl on the snow: **Pressure (p) = 410 N / 0.12 m²** Calculating this, we find that the pressure exerted by the girl on the snow is approximately **3416.67 Pa**. Note: The answer has been rounded to the nearest whole number as requested.