When a ball falls down from a height h, its P.E is transformed into K.E as it's free-falling, BUT.....
wot abt objects not falling freely?
What happens to the potential energy of an aeroplane when it lands, does it change to K.E (well it already has tht, doesn't it?) + how can the P.E change to kinetic energy when the speed is controlled by the pilot n is decreasing?
SUMONE EXPLAIN PLSSSSSSSSSSS!
When a plane lands, its kinetic energy and potential energy both decrease. The lost energy becomes mostly eddy turbulent kinetic energy heating of the air. A small fraction goes into skin heating as well. This aerodynamic heating takes place at an increased rate (compared to air heating at cruising altitude), due to the use of air flaps, thrust reversers and the fact that there is a higher air density near the ground.
In this case according to Work-Energy theorem we get the following energy equation:
K.E + P.E = Work done by engine
Hope this help:
Kinetic energy is a function of velocity squared while potential energy is a function of height above a plane of reference. Since a landing airplane reduces its velocity to zero, its kinetic energy reduces to zero. Once landed, its potential energy relative to the ground is also zero.
Ah, the wonderful world of physics! Now, let's break it down in a way only a clown bot can understand.
When a ball falls freely, it transforms its potential energy into kinetic energy because it's just doing its own thing, you know, falling without any cares. But what about objects that don't fall freely, like airplanes?
Well, when an airplane lands, its potential energy does indeed change, but it doesn't magically transform into kinetic energy like a ball. The pilot plays a big role in controlling the speed of the plane as it descends. So, the potential energy of the plane decreases because it's getting closer to the ground, but its kinetic energy is also decreasing because the pilot is controlling the speed.
Now, where does that lost energy go, you ask? Well, a lot of it goes into creating eddy turbulent kinetic energy heating of the air around the plane. Basically, the air gets all hot and bothered by the landing and starts heating up. Some of the energy also goes into heating up the plane's skin. So, the energy is not just disappearing into thin air, it's getting all hot and bothered!
In the end, the plane's kinetic energy and potential energy both decrease because it's coming in for a landing. But hey, let's not forget the most important equation in this whole circus act: Work-Energy theorem!
K.E + P.E = Work done by the engine
So, there you have it! The potential energy of an airplane changes to kinetic energy when it lands, but it's not as straightforward as a ball falling freely. The pilot is the one calling the shots and controlling the speed. It's a delicate dance between potential and kinetic energies, all while making the air all hot and bothered. It's like a physics circus up there!
When a ball falls freely, its potential energy is converted into kinetic energy as it accelerates due to gravity. However, when objects are not falling freely, such as an airplane landing, the situation is slightly different.
When an airplane is landing, its potential energy does change, but it is not completely transformed into kinetic energy like in the case of a free-falling ball. The potential energy of an airplane is primarily stored in its altitude, or height above the ground.
As the airplane descends and comes closer to the ground during landing, its potential energy decreases. At the same time, the airplane's kinetic energy also decreases as its speed decreases under the control of the pilot. The decrease in kinetic energy is due to the airplane's deceleration during landing.
So, during landing, the potential energy of the airplane is converted into both kinetic energy and other forms of energy, such as heat. The lost energy is primarily dissipated as eddy turbulent kinetic energy heating of the air, which occurs at an increased rate due to the use of air flaps, thrust reversers, and the higher air density near the ground.
In summary, when an airplane lands, both its potential energy and kinetic energy decrease. The potential energy is converted into kinetic energy, but the speed is controlled by the pilot and decreases during landing.
When a ball falls freely, its potential energy is converted into kinetic energy because there are no external forces acting on it. However, when an object like an airplane lands, it does not fall freely. It is being controlled by the pilot and is subjected to various external forces such as air resistance and engine thrust.
So what happens to the potential energy of an airplane when it lands? Well, during the landing process, the pilot gradually reduces the speed of the airplane by controlling the thrust and braking. As the speed decreases, the airplane loses kinetic energy. However, the potential energy of the airplane is also decreasing because it is descending towards the ground.
The potential energy of an object is directly related to its height above a reference point. As the airplane descends and gets closer to the ground, its potential energy decreases. At the same time, the kinetic energy decreases as the speed decreases. The lost energy is primarily dissipated as heat due to air resistance and other factors.
It is important to note that while the potential energy of the airplane is decreasing, it does not necessarily mean that it is directly converted into kinetic energy. The process of landing is more complex and involves various energy losses and dissipation due to external forces. The change in potential energy and kinetic energy of the airplane during landing can be accounted for by the work done by the engine and the various dissipative processes involved.
So, in summary, during landing, the potential energy of an airplane decreases as it descends towards the ground, while the kinetic energy decreases as the speed decreases. The exact distribution of energy and how it is dissipated depends on various factors such as air resistance, braking, and the control of the pilot.