Question

Физика 7 класс, пожалуйста, срочно помогите!! Корабль получил пробоину. С какой силой нужно прижимать заглушку из трюма Корабля, чтобы давление воды и не выбило её площадь пробоины 20см² глубина 1 м Ответ дайте в ньютонах. плотность воды принять равной 1000 кг/м³, ускорение свободного падения 10 Н/кг

Answer 1

1 найдем давление P = p*g*h=1000*10*1=10000 Н
2 Найдем силу давления на заглушку
F= P*s = 10000*0,002 =20 Н

Answer 2

Calculation of the Force Required to Hold the Plug in Place

To calculate the force required to hold the plug in place and prevent water from escaping through the hole, we can use the concept of pressure. Pressure is defined as the force per unit area. In this case, the force is the weight of the water column above the plug, and the area is the area of the hole.

The formula to calculate pressure is:

Pressure = Force / Area

In this case, the force is the weight of the water column above the plug, which can be calculated using the formula:

Force = Mass x Acceleration due to gravity

The mass of the water column can be calculated using the formula:

Mass = Density x Volume

The volume of the water column can be calculated using the formula:

Volume = Area x Depth

Let's calculate the force required to hold the plug in place.

Calculation Steps:

1. Calculate the volume of the water column: - Area = 20 cm² = 0.002 m² - Depth = 1 m - Volume = Area x Depth

2. Calculate the mass of the water column: - Density of water = 1000 kg/m³ - Mass = Density x Volume

3. Calculate the force required to hold the plug in place: - Acceleration due to gravity = 10 N/kg - Force = Mass x Acceleration due to gravity

Let's perform the calculations:

1. Calculate the volume of the water column: - Area = 0.002 m² - Depth = 1 m - Volume = 0.002 m² x 1 m = 0.002 m³

2. Calculate the mass of the water column: - Density of water = 1000 kg/m³ - Mass = 1000 kg/m³ x 0.002 m³ = 2 kg

3. Calculate the force required to hold the plug in place: - Acceleration due to gravity = 10 N/kg - Force = 2 kg x 10 N/kg = 20 N

Therefore, the force required to hold the plug in place and prevent water from escaping through the hole is 20 Newtons.

Please note that the calculations provided are based on the given information and assumptions.