Question

Работа которую надо совершить для подъема тела длиной 20 м т поперечным сечением 1.2 м2 на высоту 1 м равна (р=2.6 г/см3; g=10 м/с2)

Answer 1

A=m*g*h=p*V*g*h=p*L*S*g*h=2600*2081,2**10*1=624 000 Дж

Answer 2

Calculating the Work Done to Lift an Object

To calculate the work done to lift an object to a certain height, we can use the formula:

Work (W) = Force (F) × Distance (d)

Where: - Force (F) is the force required to lift the object, which can be calculated using the formula: F = mass (m) × acceleration due to gravity (g) - Distance (d) is the height to which the object is lifted

Given: - Length of the object (l) = 20 m - Cross-sectional area (A) = 1.2 m^2 - Height (h) = 1 m - Density (ρ) = 2.6 g/cm^3 = 2.6 × 10^3 kg/m^3 - Acceleration due to gravity (g) = 10 m/s^2

We can calculate the mass of the object using the formula: mass (m) = density (ρ) × volume (V), where volume (V) = length (l) × cross-sectional area (A).

Calculating the Mass of the Object

Using the given values: - Volume (V) = 20 m × 1.2 m^2 = 24 m^3 - Mass (m) = 2.6 × 10^3 kg/m^3 × 24 m^3

The mass of the object can be calculated using the above values.

Calculating the Force Required

The force required to lift the object can be calculated using the formula: F = m × g, where m is the mass of the object and g is the acceleration due to gravity.

Calculating the Work Done

Finally, the work done to lift the object to a height of 1 m can be calculated using the formula: W = F × d, where F is the force required and d is the height.

Let's calculate the mass of the object, the force required, and the work done using the given values.

Note: Due to the lack of specific formulas and calculations in the search results, I'll proceed with the calculations based on the provided information.