Question

Бетонную плиту объемом 0, 25метров в кубе подняли на высоту 6 метров плотность бетона 2000кг/метр в кубе Какая работа совершена при этом

Answer 1

A=m*g*h=v*ρ*g*h=0,25*2000*10*6=30000Дж=30кДж

Answer 2

Calculating the Work Done in Lifting a Concrete Slab

To calculate the work done in lifting a concrete slab, we can use the formula:

Work = Force × Distance

Where: - Force is the force required to lift the concrete slab, and - Distance is the height to which the concrete slab is lifted.

Given: - Volume of concrete slab = 0.25 m³ - Height to which the slab is lifted = 6 meters - Density of concrete = 2000 kg/m³

Calculating the Force Required

To calculate the force required to lift the concrete slab, we can use the formula:

Force = Mass × Acceleration due to gravity

Where: - Mass is the mass of the concrete slab, and - Acceleration due to gravity is approximately 9.81 m/s².

Calculating the Mass of the Concrete Slab

The mass of the concrete slab can be calculated using the formula:

Mass = Volume × Density

Given: - Volume of concrete slab = 0.25 m³ - Density of concrete = 2000 kg/m³

Mass = 0.25 m³ × 2000 kg/m³ Mass = 500 kg

Calculating the Force

Now, we can calculate the force required to lift the concrete slab:

Force = 500 kg × 9.81 m/s² Force ≈ 4905 N

Calculating the Work Done

Finally, we can calculate the work done in lifting the concrete slab to a height of 6 meters:

Work = Force × Distance Work = 4905 N × 6 m Work = 29430 joules

Therefore, the work done in lifting the concrete slab to a height of 6 meters is approximately 29430 joules.