Kinetic energy is the energy an object has due to its motion. It depends on two main things: the mass of the object and the velocity at which the object moves. In other words, the more massive an object is or the greater the velocity, the higher the kinetic energy. This sort of energy is a scalar quantity—a value with magnitude but no direction.

There are many examples of kinetic energy in real life: for example, a moving car, which increases in kinetic energy as the speed increases or even as the mass of the object increases. Therefore, a truck moving at a speed similar to that of a bicycle holds more kinetic energy due to its increased mass. In sports, when a soccer player kicks a ball, there is kinetic energy in the ball as it moves, which affects its speed and direction.

Flowing water in rivers holds kinetic energy that can be used in hydroelectric power. An airplane in flight contains plenty of kinetic energy, which is needed to maintain lift and propulsion. Even running animals—such as dogs in a park—are examples of kinetic energy, as they move fast.

In a nutshell, kinetic energy lies at the basis of several physical phenomena, apparently experienced in everyday situations, and this forms one of the core ideas regarding motion and the transfer of energies.

Click here:
https://www.tiwariacademy.com/ncert-solutions/class-11/physics/chapter-5/