Question

На полу стоит мальчик массой 45 кг. Какое давление производит на пол, если общая площадь подошв обоих его ботинок соприкасающихся с полом, равна 300 см2?

Answer 1

давление производит на пол

 

p=F/S = mg/S =45*10/300 =1,5 Н/см2 = 15000 Н/м2= 15 кПа

 

Answer 2

Calculating Pressure Exerted by the Boy

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

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

Where: - Force (F) = Weight of the boy = 45 kg * 9.8 m/s^2 (acceleration due to gravity) = 441 N - Area (A) = 300 cm^2 = 0.03 m^2

Now, let's calculate the pressure using the given values.

Calculation

Pressure (P) = 441 N / 0.03 m^2

Pressure (P) = 14700 Pa

So, the boy exerts a pressure of 14700 Pascals on the floor.