Question

Самолет летит на высоте 4 км от поверхности земли со скоростью 720км/ч. Чему равно отношение потенциальной энергии самолета к кинетической? Потенциальную энергиюна поверхности земли считать равной нулю.

Answer 1

Еп=mgh
Eк=mu^2/2
Eп/Ек=2mgh/mu^2=
2gh/u^2=2*10*4000/200^2=2

Answer 2

Calculation of the Ratio of Potential Energy to Kinetic Energy

To calculate the ratio of the potential energy of the airplane to its kinetic energy, we need to use the formula for potential energy and kinetic energy.

The potential energy of an object is given by the formula:

Potential Energy = mass x gravitational acceleration x height

The kinetic energy of an object is given by the formula:

Kinetic Energy = 0.5 x mass x velocity^2

In this case, the airplane is flying at a height of 4 km (or 4000 meters) above the surface of the Earth with a velocity of 720 km/h (or 200 m/s).

Let's calculate the potential energy and kinetic energy of the airplane and find their ratio.

1. Potential Energy: - Mass: We don't have the mass of the airplane, so we cannot calculate the exact potential energy. However, we can still find the ratio of potential energy to kinetic energy without knowing the mass. - Gravitational acceleration: The standard value for gravitational acceleration is approximately 9.8 m/s^2. - Height: The airplane is flying at a height of 4 km, which is equal to 4000 meters.

Using the formula for potential energy, we can calculate the potential energy of the airplane:

Potential Energy = mass x gravitational acceleration x height

2. Kinetic Energy: - Mass: We don't have the mass of the airplane, so we cannot calculate the exact kinetic energy. However, we can still find the ratio of potential energy to kinetic energy without knowing the mass. - Velocity: The airplane is flying at a velocity of 720 km/h, which is equal to 200 m/s.

Using the formula for kinetic energy, we can calculate the kinetic energy of the airplane:

Kinetic Energy = 0.5 x mass x velocity^2

Now, let's calculate the ratio of potential energy to kinetic energy:

Ratio = Potential Energy / Kinetic Energy

Unfortunately, without knowing the mass of the airplane, we cannot calculate the exact ratio of potential energy to kinetic energy. However, we can still provide a general formula for the ratio:

Ratio = (mass x gravitational acceleration x height) / (0.5 x mass x velocity^2)

Please note that this formula is a general representation and does not provide an exact numerical value without knowing the mass of the airplane.