By increasing temperature the kinetic energy of the particles will also increases

Is it possible to change the kinetic energy of a body without applying force?

Yes, it is possible to change the kinetic energy of a body without directly applying force to it. This can be achieved through various other factors that can influence the body's kinetic energy.

1. Change in mass:
The kinetic energy of a body is directly proportional to its mass. Therefore, by altering the mass of an object, its kinetic energy can also be changed. Increasing the mass of the body will result in a higher kinetic energy, while decreasing the mass will lead to a lower kinetic energy. This change in mass can occur through various means such as adding or removing additional material to the body.

2. Change in velocity:
The kinetic energy of a body is also dependent on its velocity. The relationship between kinetic energy and velocity is quadratic, meaning that even a small change in velocity can have a significant impact on the kinetic energy. By altering the velocity of an object, its kinetic energy can be modified. This change in velocity can be achieved through external factors such as gravitational pull, collisions, or even changes in the direction of motion.

3. Change in potential energy:
The concept of conservation of energy states that energy cannot be created or destroyed, but it can be converted from one form to another. Potential energy and kinetic energy are interrelated. By converting potential energy into kinetic energy, the overall kinetic energy of the body can be changed. This can occur through processes such as falling from a height, where potential energy is converted into kinetic energy.

4. Conversion from other forms of energy:
Energy can be converted from one form to another. By converting other forms of energy, such as thermal or electrical energy, into kinetic energy, the overall kinetic energy of the body can be altered. For example, an electric motor can convert electrical energy into kinetic energy to drive a machine or vehicle.

In conclusion, although force is the most direct way to change the kinetic energy of a body, it is not the only means. By altering factors such as mass, velocity, potential energy, or converting energy from other forms, the kinetic energy of a body can be changed without directly applying force.