Question

Бетонная плита массой 500кг поднята на высоту 8м. Какая работа произведена при этом?

Answer 1

А = m*h*g (g=10 м/с²)

 

А=500*8*10=40000 Дж

 

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Answer 2

Calculation of Work Done

To calculate the work done in lifting a concrete slab weighing 500 kg to a height of 8 m, we can use the formula:

Work = Force × Distance

In this case, the force is equal to the weight of the concrete slab, which can be calculated using the formula:

Weight = Mass × Acceleration due to gravity

The acceleration due to gravity is approximately 9.8 m/s².

Let's calculate the weight of the concrete slab first:

Weight = 500 kg × 9.8 m/s²

The weight of the concrete slab is 4900 N (Newtons).

Now, we can calculate the work done:

Work = 4900 N × 8 m

The work done in lifting the concrete slab to a height of 8 m is 39,200 Joules (J).

Therefore, the work done in lifting the concrete slab weighing 500 kg to a height of 8 m is 39,200 Joules.

Please note that the above calculations assume ideal conditions and do not take into account factors such as friction or air resistance.