Question

Самолёт массой 3 т поднялся на высоту 900 м. Какая работа затрачена на подъём? (g≈10 Н/кг ). Ответ: работа, совершаемая при подъёме самолёта, равна ? МДж.

Answer 1

A= mgh= 3000*900*10=27.000.000Дж= 27МДж

Answer 2

Calculation of Work Done in Lifting the Airplane

To calculate the work done in lifting the airplane, we can use the formula:

Work = Force × Distance

In this case, the force is equal to the weight of the airplane, and the distance is the height the airplane is lifted.

Given: - Mass of the airplane = 3 t (tonnes) - Height = 900 m - Acceleration due to gravity (g) ≈ 10 N/kg

To calculate the weight of the airplane, we can use the formula:

Weight = Mass × Acceleration due to gravity

Weight = 3 t × 10 N/kg = 30,000 kg × 10 N/kg = 300,000 N

Now, we can calculate the work done:

Work = Weight × Distance

Work = 300,000 N × 900 m = 270,000,000 N·m

Since 1 Joule (J) is equal to 1 N·m, we can convert the work to Joules:

Work = 270,000,000 N·m = 270,000,000 J

Therefore, the work done in lifting the airplane is 270,000,000 Joules (J).

Please note that the sources provided did not contain specific information related to the calculation of work for lifting an airplane. The calculation is based on the principles of physics and the given parameters.