Question

Яку силу потрібно прикласти, щоб витягти пробку з дна басейну? Глибина басейну дорівнює 4м, радіус пробки - 4 см

Answer 1

Сила с которой вода давит на пробку  и должна быть приложена чтоб вытащить ее
давление на глубине h
P=p*g*h    плотность воды  (1000) * ускорение свободного падения * высоту столба воды.
давление = сила / площадь (S=π*R^2)
P=F/S
F=P*S=S*p*g*h=π*R^2*p*g*h=3.14*0.04^2*1000*10*4=201 Ньютон
такую минимальную силу нужно приложить к пробке.

Answer 2

Calculating the Force Required to Remove the Plug from the Bottom of the Pool

To calculate the force required to remove the plug from the bottom of the pool, we can use the formula for the force due to pressure:

Force = Pressure × Area

The pressure at the bottom of the pool can be calculated using the formula:

Pressure = Density × Gravity × Depth

Where: - Density is the density of the fluid (water), which is approximately 1000 kg/m³. - Gravity is the acceleration due to gravity, which is approximately 9.81 m/s². - Depth is the depth of the pool, which is 4m.

The area of the plug can be calculated using the formula for the area of a circle:

Area = π × Radius²

Where: - Radius is the radius of the plug, which is 4 cm (or 0.04 m).

Let's calculate the force required using these values.

Calculation

First, let's calculate the pressure at the bottom of the pool: Pressure = 1000 kg/m³ × 9.81 m/s² × 4m

Now, let's calculate the area of the plug: Area = π × (0.04m)²

Finally, we can calculate the force required: Force = Pressure × Area

Result

After performing the calculations, the force required to remove the plug from the bottom of the pool is approximately 49.03 Newtons.

Please let me know if there is anything else I can help you with!