Question

Даю 30 баллов!!! Какой силой нужно удерживать в воде кирпич объемом 0,5 м3(метров кубических)?

Answer 1

Силой сопровождение

Answer 2

Calculating the Force Needed to Hold a Brick in Water

To calculate the force needed to hold a brick in water, we can use the formula:

Force = Weight of the brick - Buoyant force

Where: - Weight of the brick is the force exerted by the brick due to gravity. - Buoyant force is the upward force exerted by a fluid that opposes the weight of an immersed object.

Weight of the Brick

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

Weight = Volume × Density × Acceleration due to gravity

Given: - Volume of the brick = 0.5 m³ - Density of the brick (assumed to be 2400 kg/m³, which is a typical value for bricks) - Acceleration due to gravity (g) = 9.81 m/s²

Using the given values, we can calculate the weight of the brick.

Weight = 0.5 m³ × 2400 kg/m³ × 9.81 m/s²

Weight = 0.5 × 2400 × 9.81

Weight = 11,760 N

Buoyant Force

The buoyant force can be calculated using the formula:

Buoyant force = Volume of the fluid displaced × Density of the fluid × Acceleration due to gravity

For an object fully submerged in water, the volume of the fluid displaced is equal to the volume of the object.

Given: - Volume of the brick = 0.5 m³ - Density of water = 1000 kg/m³ - Acceleration due to gravity (g) = 9.81 m/s²

Using the given values, we can calculate the buoyant force.

Buoyant force = 0.5 m³ × 1000 kg/m³ × 9.81 m/s²

Buoyant force = 0.5 × 1000 × 9.81

Buoyant force = 4,905 N

Calculating the Force

Now, we can calculate the force needed to hold the brick in water.

Force = Weight of the brick - Buoyant force

Force = 11,760 N - 4,905 N

Force = 6,855 N

Therefore, the force needed to hold a brick with a volume of 0.5 m³ in water is approximately 6,855 Newtons.