Question

Мальчик массой 43 кг стоит на лыжах. Длина каждой лыжи равна 1,3 м, ширина равна 10 см. Какое давление оказывает мальчик на снег? Принять g≈10Н/кг. Ответ (округли до целого числа): мальчик оказывает на снег давление p

Answer 1

S = ab = 1,3*0,1 = 0,13м^2
S = S*2 = 0,13*2 = 0,26м^2
p = F/S = mg/S = 430/0,26 = 1653,846 = 1654 Па
Ответ : 1654 Па

Answer 2

Р=F/S
F=mg; F=43 кг • 10 Н/кг=430 Н
S=(1,3 м•0,1 м)•2=0,26 м²
p=430 Н/0,26 м²=1654 Па

Answer 3

Calculation of Pressure

To calculate the pressure exerted by the boy on the snow, we can use the formula:

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

The force exerted by the boy is equal to his weight, which can be calculated using the formula:

Weight (W) = mass (m) * acceleration due to gravity (g)

Given that the mass of the boy is 43 kg and the acceleration due to gravity is approximately 10 N/kg, we can calculate the weight:

Weight (W) = 43 kg * 10 N/kg = 430 N

Now, let's calculate the area of contact between the boy and the snow. The area can be calculated by multiplying the length and width of each ski:

Area (A) = 2 * (length of ski) * (width of ski)

Given that the length of each ski is 1.3 m and the width is 10 cm (or 0.1 m), we can calculate the area:

Area (A) = 2 * 1.3 m * 0.1 m = 0.26 m²

Now, we can substitute the values into the pressure formula to calculate the pressure exerted by the boy on the snow:

Pressure (p) = 430 N / 0.26 m²

Calculating this value gives us the pressure exerted by the boy on the snow.