Question

Какое давление оказывает на пол обеденный стол, имеющий массу 80 кг? известно, что площадь одной ножки стола 100 см2

Answer 1

M=80 кг                      формула давления:p=F/s;  F=mg- сила давления,
g=10 Н/кг                       тогда: p=mg/s;
s=100*4 см²=                            p=80*10/0,04=20 000 Па.
=400 см²=0,04 м²           Ответ:p =20 000 Па
p-?

Answer 2

Calculating Pressure Exerted by the Table

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

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

Where: - Force (F) is the weight of the table, which can be calculated using the formula: Weight = Mass × Acceleration due to gravity - Area (A) is the area of one table leg, given as 100 cm².

Calculating the Weight of the Table

The weight of the table can be calculated using the formula:

Weight = Mass × Acceleration due to gravity

Given: - Mass of the table = 80 kg - Acceleration due to gravity = 9.81 m/s²

Using the above values, we can calculate the weight of the table.

Calculation

Weight = 80 kg × 9.81 m/s²

Weight = 784.8 N

Calculating Pressure

Now, we can use the weight we calculated to find the pressure exerted by the table on the floor.

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

Pressure = 784.8 N / (100 cm²)

Converting the area to square meters: Area = 100 cm² = 0.01 m²

Pressure = 784.8 N / 0.01 m²

Pressure ≈ 78480 Pa

So, the pressure exerted by the table on the floor is approximately 78480 Pascals (Pa).