Question

Какую силу нужно приложить, чтобы удержать в воде стальной рельс объемом 0 .7 м( в кубе) ?? ( плотность воды 1000 кг м3 , стали 7800кгм 3)

Answer 1

Удержать в воде означает,что ускорение равно нулю.

0=PcVg-PвVg-F

F=PcVg-PвVg

Answer 2

Calculating the Force Required to Hold a Steel Rail in Water

To calculate the force required to hold a steel rail in water, we can use the formula:

Force = Weight of the displaced water

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

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

Given: - Volume of the steel rail = 0.7 m^3 - Density of water = 1000 kg/m^3 - Density of steel = 7800 kg/m^3

Calculating the Weight of the Displaced Water

Using the formula for weight, we can calculate the weight of the displaced water:

Weight = 0.7 m^3 × 1000 kg/m^3 × 9.81 m/s^2 Weight = 6867 N

Conclusion

Therefore, the force required to hold the steel rail in water is approximately 6867 Newtons.