Question

Вычислите работу, совершаемуюпри подъёме гранитной плиты объёмом 0,5 м3 на высоту 20 м. Плотность гранита 2500 кг/м3

Answer 1

A=mgh=rVgh=2500*0,5*10*20=250 000 Dgoyl'

Answer 2

Calculation of Work Done in Lifting a Granite Slab

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

Work = Force × Distance

In this case, the force can be calculated using the formula:

Force = Mass × Acceleration due to gravity

The mass of the granite slab can be calculated using its volume and density:

Mass = Volume × Density

Given: - Volume of the granite slab = 0.5 m^3 - Height of the lift = 20 m - Density of granite = 2500 kg/m^3

Let's calculate the work done step by step.

1. Calculate the mass of the granite slab: - Mass = Volume × Density - Mass = 0.5 m^3 × 2500 kg/m^3 - Mass = 1250 kg

2. Calculate the force exerted on the granite slab: - Force = Mass × Acceleration due to gravity - Acceleration due to gravity is approximately 9.8 m/s^2 - Force = 1250 kg × 9.8 m/s^2 - Force = 12250 N

3. Calculate the work done: - Work = Force × Distance - Work = 12250 N × 20 m - Work = 245000 J (Joules)

Therefore, the work done in lifting the granite slab with a volume of 0.5 m^3 to a height of 20 m is 245,000 Joules (J).

Please note that this calculation assumes that the lifting is done vertically without any additional factors such as friction or air resistance.