Question

How do we use kinetic energy in everyday life?

Answer 1

Kinetic Energy:

1. It is a form of energy that an object or a particle has by reason of its motion.
2. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.
3. It is a property of a moving object or particle and depends not only on its motion but also on its mass. The kind of motion may be a translation ( or motion along a straight path from one place to another ), rotation about an axis, vibration, or any combination of motions.

$\mathrm{Kinetic}\mathrm{Energy}=\frac{1}{2}{\mathrm{mv}}^2$

where m is mass and v is the velocity of a body.

Following are some examples of how kinetic energy is employed in everyday life:

1. Flying airplane
2. Walking and running
3. Cycling
4. In a windmill, when the moving air hits the blades, it causes rotation which ultimately leads to the generation of electricity.
5. In a hydropower plant, when the kinetic energy of the moving water hits the turbine the kinetic energy of the water gets converted to mechanical energy. This mechanical energy is then transformed into electric energy.
6. In a cricket ball, when a bowler has a cricket ball in his hand, the kinetic energy of the ball is zero because it is at rest.