Question

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

Answer 1

скорость(v)=108км/ч=30м/с

Ек=(mv^2)/2=(200кг*30^2м/с) / 2=90кДж  -кинетическая энергия

Еп=mgh=200кг*10*500м=1мДж   -потенциальная энергия

Answer 2

 

Еп=mgh=200*500*10=1000000 Дж=1 МДж

 

 

Ек=m(v)2/2=500*(30)2/2=500*900/2=225000 Дж=225 КДж

 

0.5 км=500 м

0.2 т=200 кг

108 км/ч=30 м/с

 

 

 

 

 

 

Answer 3

Calculation of Kinetic and Potential Energies of an Airplane

To calculate the kinetic and potential energies of an airplane, we need to consider its mass, height, and velocity.

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

Calculation of Kinetic Energy:

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

Kinetic Energy = (1/2) * mass * velocity^2

Substituting the given values: Kinetic Energy = (1/2) * 200 kg * (30 m/s)^2

Calculating the value: Kinetic Energy = 1/2 * 200 kg * 900 m^2/s^2 = 90,000 J

Therefore, the kinetic energy of the airplane is 90,000 Joules.

Calculation of Potential Energy:

The potential energy of an object at a certain height is given by the formula:

Potential Energy = mass * gravity * height

Where: - mass is the mass of the object - gravity is the acceleration due to gravity (approximately 9.8 m/s^2) - height is the height of the object above a reference point

Substituting the given values: Potential Energy = 200 kg * 9.8 m/s^2 * 500 m

Calculating the value: Potential Energy = 200 kg * 9.8 m/s^2 * 500 m = 980,000 J

Therefore, the potential energy of the airplane is 980,000 Joules.

Summary:

The kinetic energy of the airplane is 90,000 Joules, and the potential energy is 980,000 Joules.

Please note that these calculations assume no other external forces acting on the airplane, such as air resistance or wind.