In our everyday life we encounter many times when the concept of energy is involved. For example, when we connect a device in our house we are using electricity, a car uses energy supplied fuel to move, among other activities.
Even if the energy involved in all our daily lives its definition is not so simple, since we can not get it or even see it. In physics, the simplest definition and also used is that energy is the ability to perform some work.
Energy can be of various types: electric potential energy, elastic potential energy, chemical energy, mechanical energy , kinetic energy, among others. In this material we will know a little more about the kinetic energy.
Energy and its use
Mankind has always used the power to obtain a more favorable condition in your life, thus, greater comfort and ease at work. With electricity, for example, it was possible to have multiple devices, including television, refrigerator, and many other useful equipment on a daily basis and which helpers in the manufacture of other materials.
Kinetic energy is a form of energy that is related to the motion of a body. The kinetic energy is a type of mechanical energy, whose main characteristic purchased power through a body to be in motion. This energy is directly linked to the movement, and also the mass of the body.
What differs from the kinetic energy of the formula is that the speed is always crafted squared (V2). This means that the moving object gains kinetic energy, and as a result of its speed, energy grows faster.
Besides the kinetic energy being directly connected to the speed, the mass body is also proportional to the kinetic force. Thus, between two objects of the same speed, the heavier is the one with more kinetic energy. Check the formula of kinetic energy:
C = ½. m. V2
C = Kinetic Energy
m = mass in Kg
V = Km / h
The kinetic energy and mechanical energy are connected, moreover, no connection with the work. It is worth noting that work is an energy obtained through the use of force in a given path. Thus, any movement is a job. Push some object is a job, and thus the pushed object gains kinetic energy along its displacement.
Kinetic energy in practice
It is not always easy to imagine the kinetic energy in practice itself. So, nothing better than an example of simply your actual operation.
In another example of kinetic energy we can see in car accidents. When an accident happens where the cause is the high speed, beat at high speed when a considerable mass, the car gets a lot of kinetic energy. But if the car crash into a wall, this kinetic energy is eventually dissipated as noise, heat and other forms of energy. In this case worth the case where “in nature nothing is lost, everything is transformed”.
Let us now think of a rollercoaster. Who ever walked the toy, or even seen one in action, knows that the roller coaster offers various movements goers. However, thinking in physics, the toy is always converting potential energy to kinetic energy. On top of the roller coaster, the potential energy is at its maximum. When descending, the potential energy is converted into kinetic energy, and the train accelerates. At the base of the hill, the kinetic energy is at its maximum, and the potential energy minimum.
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