Question

На полу стоит мальчик массой 51кг. Какое давление производит на пол, если общая площадь подошв обоих его ботинок соприкасающихся с полом, равна 300см^2

Answer 1

P=F/S
F=Fтяж
Fтяж=mg
p=mg/S
S=300 см^2
Значит, нужно перевести в квадратные метры
S=0,03м^2
p=51*10/0,03=17000Па
Ответ: p=17000Па

Answer 2

Calculation of Pressure

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

Pressure = Force / Area

In this case, the force is equal to the weight of the boy, which is given as 51 kg. The area is the total area of the soles of both his shoes in contact with the floor, which is given as 300 cm^2.

Converting the area to square meters, we have:

Area = 300 cm^2 = 300 / 10000 m^2 = 0.03 m^2

Now, we can calculate the pressure:

Pressure = 51 kg / 0.03 m^2

Calculating this, we find:

Pressure = 1700 kg/m^2

Therefore, the boy exerts a pressure of 1700 kg/m^2 on the floor.