When an object stops moving, its kinetic energy is converted into other forms of energy or is dissipated as heat. Kinetic energy is the energy possessed by an object due to its motion. It depends on two factors: the mass of the object and its velocity.
When an object is in motion, it has kinetic energy proportional to its mass and the square of its velocity. However, when the object comes to a stop, its velocity becomes zero. Therefore, the kinetic energy of the object also becomes zero.
According to the principle of conservation of energy, energy cannot be created or destroyed but only transferred or transformed. So, when the object stops moving, the kinetic energy is not lost but is converted into other forms of energy. The exact form of energy it transforms into depends on the circumstances and the nature of the object.
For example, if a moving car comes to a stop, the kinetic energy it possessed will be transformed into several forms. Some of the energy may be transferred to the brakes, causing them to heat up. The friction between the tires and the road may also convert some of the kinetic energy into heat. Additionally, if the car hits an obstacle, some of the energy may be transferred as deformation energy to the object it collides with.
In summary, when an object stops moving, its kinetic energy is not lost but is converted into various other forms of energy, such as heat, sound, or potential energy, depending on the specific circumstances.