If we reduce friction, the kinetic energy of an object will increase.
Friction is a force that opposes motion between two surfaces in contact. It acts to slow down or stop the movement of an object. When friction is present, it converts some of the object's kinetic energy into other forms of energy, such as heat or sound, resulting in a decrease in kinetic energy.
By reducing friction, we decrease the amount of energy lost due to frictional forces. This means that less kinetic energy is converted into other forms of energy, resulting in a higher overall kinetic energy for the object.
Therefore, when friction is reduced, the kinetic energy of an object increases.