When an object is moving, it possess an energy and such energy is called kinetic energy. To know more about kinetic energy, click here. Kinetic energy is explained along with their pictures here.
The word kinetic is derived from the Greek word “kinesis” meaning motion. When an object is moving, it possess energy and such energy is called kinetic energy. The object includes very large things, like planets, and very small ones, like atoms.
Heavier objects moves faster and have more kinetic energy. Kinetic energy may be best understood by examples that demonstrate how it is transformed to and from other forms of energy.
Kinetic energy is one of many types of energy that exist. This is energy generated because something is moving — the faster it’s going, the more kinetic energy it has. A person sitting has no kinetic energy, but a person running like a maniac has tremendous kinetic energy:
The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed.
The amount of kinetic energy KE of an object in translational motion is equal to one-half the product of its mass m and the square of its velocity v.
Kinetic energy is given as follows,
Kinetic energy = ½(mv2)
Three types of kinetic energy are available. They are
Rotational Kinetic Energy
Translational Kinetic Energy
Vibrational Kinetic Energy
Rotational kinetic energy occurs when matter spins around an axis. The second hand on a watch exhibits rotational energy. The Earth has rotational energy as it spins around its axis. Some pictures of rotational kinetic energy are shown here.
Translational Kinetic Energy is when something is moving in a straight line, like driving your car down the road. It is also when molecules of air are flying around us all the time. Some pictures of translational kinetic energy are shown here.
Vibrational Kinetic Energy is Vibrational energy through Vibrational motion. Think of a spring joining two weights together. You pull on one of the weights far away and then watch them swing back and forth, towards and away from each other. This is also the same kind of motion that atoms when they are joined together to form molecules. Vibrational kinetic energy pictures can be seen here.
Kinetic energy can be seen in daily life. Some of the example that can be seen in normal life are explained below.
When you hit a nail on a wall with a hammer with a force, thereby, with a velocity as shown in the picture, the kinetic energy of the hammer helps you to drive the nail into the wall.
Another example of kinetic energy is billiards which is shown in the picture. In billiards, a player gives the cue ball kinetic energy when he strikes the ball with the cue. As the ball rolls, it exerts kinetic energy.