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Last updated on September 30th, 2019 at 03:28 pm
Kinetic energy is the energy associated with the motion of a mass particle. Alternatively, it is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Sounds confusing? Let us take a particle of mass at rest. Your goal is to achieve a velocity of . Therefore, you must apply an external force and perform some work to possess the velocity. This energy will be converted to your Kinetic Energy. Now, according to Newton’s Law of Motion, the body maintains its velocity as long as there is no external force applied to it. Look at the kinetic energy formula . Thus the body retains its kinetic energy unless the velocity changes. The same amount of work which you have stored earlier is now performed by the body when decelerating from its current speed () to rest.
Kinetic energy may be best understood by examples that demonstrate its transformation to and from other forms of energy.
Below we mention such Examples of Kinetic Energy.
10 Examples of Kinetic Energy
- Kinetic Energy Moves You. We convert chemical energy provided by the foods to kinetic energy to perform all day to day activities. One such example is the burning of glucose in our body. . Read more about such examples.
- Kicking football: When you kick a football, you transfer an amount of your kinetic energy to the football. This is an example of the transfer of kinetic energy from one body to another. Did you notice that a player runs before kicking the ball? This is to gain more kinetic energy before kicking the ball.
- Washing of cars with water jet: Workers at car washing stations use a water jet to clean the vehicles. Kinetic energy stored in the water jet helps to remove dirt stuck to the body of the cars.
- Hitting nails by hammer: We move up the hammer before striking. This stores the potential energy in it. The velocity of the hammer keeps on increasing as it moves down. The kinetic energy also keeps on increasing due to its velocity.
The moment the hammer hits the object, all the kinetic energy stored in it gets transferred to the nail. Similar Topic: 10 Examples of Potential Energy.
- Asteroid falling to the earth: An asteroid falling to the earth possesses an incredible amount of kinetic energy due to its high velocity. The collision of these asteroids with the gas particles in air generates a tremendous amount of heat energy resulting in “shooting star”. This is an example of kinetic energy to heat energy.
- Working of windmills: Windmills harness the wind energy and convert it into other forms of energy like electricity. Wind energy is nothing but the cumulative kinetic energy of gas molecules. Related Post: 12 Examples of Electrical Energy.
- Flywheels: A flywheel is an efficient way of storing energy. This is a mechanical device to store rotational kinetic energy. Wheels resist the change in rotational speed by their moment of inertia. The amount of energy stored in a flywheel is proportional to the square of its rotational speed and its mass. Similar Topic: 10 Examples of Circular Motion.
- Spacecraft uses kinetic energy to reach defined orbitals. Here chemical energy is converted to kinetic energy to gain enough velocity to reach the orbital. In an entirely circular orbit, kinetic energy remains fixed.
- Bullet fired from a gun: A bullet fired from a weapon possesses a considerable amount of kinetic energy. When such bullet hits some object, the energy gets transferred from the bullet to the object. You May Like: Examples of Kinetic Energy.
- Playing drums: A drummer strikes his drums with two sticks. This causes a vibration on the surface of his drums and produces a loud sound.