Question

Самолёт летит равномерно со скоростью 900км./ч. Чему равна мощность моторов, если сила сопротивления воздуха 3000кН

Answer 1

Дано V=900 км/ч=900*1000/3600=250 м/с   Fc=3000 000 Н      N- ?

при равномерном движении Fc=F

N=Fc*V=3*10^6*250=750 МВт

Answer 2

Calculation of Power

To calculate the power of the engines, we can use the formula:

Power = Force x Velocity

In this case, the force is the force of air resistance, which is given as 3000 kN, and the velocity is 900 km/h.

Converting the force from kilonewtons (kN) to newtons (N) and the velocity from kilometers per hour (km/h) to meters per second (m/s), we have:

Force = 3000 kN = 3000 x 1000 N = 3,000,000 N

Velocity = 900 km/h = 900 x (1000/3600) m/s = 250 m/s

Now we can calculate the power:

Power = 3,000,000 N x 250 m/s = 750,000,000 W

Therefore, the power of the engines is 750,000,000 watts.

Please note that this calculation assumes that all the force of air resistance is being used to overcome the resistance and maintain a constant velocity. In reality, there may be other factors at play that affect the power requirements of the engines.