Question

Ракета с работающим двигателем «зависла» над поверхностью Земли. Какова мощность, развиваемая двигателем, если масса ракеты m, а скорость истечения газов из двигателя ракеты равна u? Изменением массы ракеты за счет истечения газов можно пренебречь.

Answer 1

В этом случае можно применять расчет мощности для равномерного движения: N=F*U=m*g*U

Answer 2

Calculation of Engine Power for a Rocket

To calculate the power developed by the engine of a rocket, we can use the formula:

Power = Force x Velocity

In this case, the force is equal to the rate of change of momentum, which can be calculated using the equation:

Force = Mass x Acceleration

Since the rocket is in a state of equilibrium, the acceleration is zero. Therefore, the force acting on the rocket is also zero. As a result, the power developed by the engine is also zero.

So, if the rocket is "hovering" above the Earth's surface, the power developed by the engine would be zero.

Please note that this calculation assumes ideal conditions and neglects factors such as air resistance and the effects of gravity. Additionally, the information provided does not specify the type or specific characteristics of the rocket engine, so it is difficult to provide a more precise answer.

If you have any further questions, please let me know!