Question

Найти кинетическую и потенциальную энергии аэроплана массой 0.2 т, летящего на высоте 0.5 км со скоростью 108км/ч

Answer 1

Eп=mqh=200*500*10=1000000
Ек=mv2/2=500*(30)2/2=500*900/2=225000 дж=225кдж
0,5n=500км
0,2n=200ru
48км/ч=30м/с

Answer 2

Calculation of Kinetic and Potential Energies of an Airplane

To find the kinetic and potential energies of an airplane, we need to use the formulas for these types of energy.

Kinetic Energy is given by the formula:

KE = (1/2) * m * v^2

where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.

Potential Energy is given by the formula:

PE = m * g * h

where PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity, and h is the height of the object.

Let's calculate the kinetic and potential energies of the airplane.

Given: - Mass of the airplane (m) = 0.2 tons = 200 kg - Height of the airplane (h) = 0.5 km = 500 m - Velocity of the airplane (v) = 108 km/h = 30 m/s

Calculation of Kinetic Energy (KE):

Using the formula for kinetic energy:

KE = (1/2) * m * v^2

Substituting the given values:

KE = (1/2) * 200 kg * (30 m/s)^2

Calculating the result:

KE = 90000 J

Therefore, the kinetic energy of the airplane is 90000 Joules.

Calculation of Potential Energy (PE):

Using the formula for potential energy:

PE = m * g * h

The acceleration due to gravity (g) is approximately 9.8 m/s^2.

Substituting the given values:

PE = 200 kg * 9.8 m/s^2 * 500 m

Calculating the result:

PE = 980000 J

Therefore, the potential energy of the airplane is 980000 Joules.

To summarize: - The kinetic energy of the airplane is 90000 Joules. - The potential energy of the airplane is 980000 Joules.

Please note that these calculations assume no energy losses due to air resistance or other factors.