Question

Автомобиль затонул в реке на глубине 3,2 метра. Вода еще не поступает в кабину водителя. Какое усилие нужно приложить, чтобы открыть дверь кабины, если ее высота 1,1 м, а ширина 0,8 м? ρ = 1000кг/м3, g≈10м/с2

Answer 1

Ответ: 28,16кН

Объяснение:

Дано:

h=3,2м

а=1,1м

в=0,8м

g=10м/c²

ρ=1000кг/м

-----------------

F-?

Р=F/S

F=PS=ρghав=1000*10*3,2*1,1*0,8=28160Н=28,16кН

Answer 2

Calculation of the Force Required to Open the Car Door

To calculate the force required to open the car door, we can use the principle of buoyancy. The force required to open the door is equal to the weight of the water displaced by the door.

The weight of the water displaced can be calculated using the formula:

Weight of water displaced = Volume of water displaced x Density of water x Acceleration due to gravity

In this case, the volume of water displaced is equal to the volume of the door, which can be calculated as:

Volume of door = Height of door x Width of door x Depth of water

Given the dimensions provided: - Height of the door (h) = 1.1 m - Width of the door (w) = 0.8 m - Depth of water (d) = 3.2 m

We can substitute these values into the formula to calculate the volume of water displaced:

Volume of water displaced = 1.1 m x 0.8 m x 3.2 m

Next, we need to calculate the weight of the water displaced by multiplying the volume of water displaced by the density of water and acceleration due to gravity:

Weight of water displaced = Volume of water displaced x Density of water x Acceleration due to gravity

Given: - Density of water (ρ) = 1000 kg/m^3 - Acceleration due to gravity (g) ≈ 10 m/s^2

We can substitute these values into the formula:

Weight of water displaced = (1.1 m x 0.8 m x 3.2 m) x (1000 kg/m^3) x (10 m/s^2)

Now we can calculate the force required to open the car door. Since the force required is equal to the weight of the water displaced, we have:

Force required = Weight of water displaced

Let's calculate the force:

Force required = (1.1 m x 0.8 m x 3.2 m) x (1000 kg/m^3) x (10 m/s^2)

Using the given values, we can calculate the force required to open the car door.